Question

Question 19 of 25What is the factorization of the polynomial below?2-3x-40-A. (x+8)(x+5)B. (x-8)(x+5)C. (x-8)(x-5)D. (x+8)(x - 5)← PREVIOUSSUBMIT

Answer 1

...

SOLUTION

`x^2-3x-40`

Get two numbers whose sum and product are -3 and -40 respectively;

`The\text{ numbers are -8 and 5}`

To factorize;

`\begin{gathered} x^2-8x+5x-40 \\ x(x-8)+5(x-8) \\ (x+5)(x-8) \end{gathered}`

OPTION B IS THE CORRECT ANSWER.