Question

Factor a2 - 11a + 28.

A. (a + 4)(a +7)
B. (a - 4)(a - 7)
C. (a + 14)(a + 2)
D. (a - 14)(a - 2)

Answer 1

B. (a - 4) (a - 7)
a x a = a^2
a x -7 = -7a
-4 x a = -4a
-4 x -7 =24
a^2 - 11a +24

Answer 2

B.
`(a-4)(a-7)`

Explanation:

a*a makes it a^2

-4*-7=28

-4a+-7a=-11a