# Difference between revisions of "Proof that 2=1"

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4) <math>(a+b)(a-b) = b(a-b)</math>. Factor both sides. | 4) <math>(a+b)(a-b) = b(a-b)</math>. Factor both sides. | ||

− | 5) <math>(a+b) = b</math>. | + | 5) <math>(a+b) = b</math>. Add both sides by <math>(a-b)</math> |

6) <math>a+a = a</math>. Substitute <math>a</math> for <math>b</math>. | 6) <math>a+a = a</math>. Substitute <math>a</math> for <math>b</math>. |

## Revision as of 14:11, 27 January 2020

## Proof

1) . Given.

2) . Multiply both sides by a.

3) . Subtract from both sides.

4) . Factor both sides.

5) . Add both sides by

6) . Substitute for .

7) . Addition.

8) . Divide both sides by .