Question

Factor a2 – 24a + 144.

Question 15 options:

A)

(a – 12)(a – 12)

B)

(a + 12)(a + 12)

C)

(a – 6)(a – 2)

D)

(a + 72)(7a + 2)

Answer 1

A. (a-12)(a-12)

Explanation:

a^2 - 24a + 144

what two numbers can be multiplied for 144? 12 and 12

12 + 12 adds up. to 24

You notice the 24 is negative so both 12's will be

(a-12)(a-12)

Answer 2

A

Explanation:

the the cross multiplication method