1980 AHSME Problems/Problem 24

Problem

For some real number $r$ , the polynomial $8x^3-4x^2-42x+45$ is divisible by $(x-r)^2$ . Which of the following numbers is closest to $r$ ?

$\text{(A)} \ 1.22 \qquad \text{(B)} \ 1.32 \qquad \text{(C)} \ 1.42 \qquad \text{(D)} \ 1.52 \qquad \text{(E)} \ 1.62$

$\fbox{}$

1980 AHSME (Problems • Answer Key • Resources)
Preceded by Problem 23	Followed by Problem 25
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