quadratics

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Middle School Math Grades 5-8, Ages 10-13, MATHCOUNTS, AMC 8

Grades 5-8, Ages 10-13, MATHCOUNTS, AMC 8

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Middle School Math Grades 5-8, Ages 10-13, MATHCOUNTS, AMC 8

Grades 5-8, Ages 10-13, MATHCOUNTS, AMC 8

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11 posts

#1 h Feb 14, 2025, 12:42 AM

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I really need help on quadratics and I don't know why I also kinda need a bit of help on graphing functions and finding the domain and range of them.

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1003 posts

#2 h Feb 14, 2025, 1:46 AM

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For quads just rememebr factoring styles and easily factoring binomails, and how to find the roots of an equation using the quadratic formula, also know how to do complex manipulations to get the answer for a quadratic equation with product and sum of the roots.

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43 posts

#3 h Feb 14, 2025, 1:58 AM

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for quadratics learn to graph them, factoring and expanding with foil method, quadratic formula, and Vieta's Formula's for quadratic equations.

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studentnumbertwo

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studentnumbertwo

#4 h Mar 4, 2025, 1:38 PM

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PLZ help How do I remember the quadratic formula???????????

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1555 posts

#5 h Mar 4, 2025, 2:12 PM

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This is a very helpful song that helped me memorize it, if it helps (not rickroll trust)

This post has been edited 1 time. Last edited by mithu542, Mar 4, 2025, 2:13 PM

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846 posts

#6 h Mar 4, 2025, 2:51 PM

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studentnumbertwo wrote:

PLZ help How do I remember the quadratic formula???????????

understand that its a generalized process of completing the square, and just memorize it

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302 posts

#7 h Mar 4, 2025, 3:37 PM

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the more you see the formula and use it in problems, the easier it will become to memorize.

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111 posts

#8 h Mar 4, 2025, 8:52 PM

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just complete the square if you aren't sure on the quadratic formula. Some problems are easier with CTS (ex - solving $x^2+4x+1=0$ ) so don't rely too heavily on formulas. Some equations are easily factorable.

For graphing, it is helpful to understand transformations of $f(x)=x^2$ and other parent functions; horizontal transformations always come first and do opposite operations in the opposite order of PEMDAS, etc.

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15 posts

#9 h Mar 7, 2025, 3:49 PM

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don’t worry about memorizing the formula.just use it a lot and you’ll get used to it.i bet you can memorize it

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5 posts

#10 h Yesterday at 6:10 PM

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i just stared at it for 1 hour and memorized it
(-b +- sqrt b^2 - 4ac )/2a

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pingpongmerrily

3496 posts

pingpongmerrily

#11 h Yesterday at 6:23 PM

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quadratics you just need a lot of practice
like take an algebra class or go through questions and just solve solve solve

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210 posts

kamuii

#12 h Today at 1:15 AM

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studentnumbertwo wrote:

PLZ help How do I remember the quadratic formula???????????

https://www.youtube.com/watch?v=VOXYMRcWbF8

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179 posts

KF329

#13 h Today at 2:17 AM

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mithu542 wrote:

This is a very helpful song that helped me memorize it, if it helps (not rickroll trust)

haha why did it actually help tho

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#14 h Today at 2:33 AM

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$x = \dfrac{-b \pm \sqrt{b^{2} - 4ac}}{2a}$

All you need to know is the minimum/maximum of a quadratic which is $\dfrac{-b}{2a}$ and memorize the discriminant of a function, and the $\pm$ sign, that's it

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