Factor by grouping. a2 + 2ab – 24b^2

(a -4b)(a +6b)

Step-by-step explanation:

You need to rewrite the middle term to do that.

... = a^2 +6ab -4ab -24b^2

... = a(a +6b) - 4b(a +6b) . . . . . factor pairs of terms

... = (a -4b)(a +6b)

b) k’(6, 4); l’(3, 3)

step-by-step explanation:

a 270° clockwise rotation maps every point (x, y) to (y, -x). (it negates the x-coordinate and then switches it and the y-coordinate.)

this means the endpoints of the side congruent to kl, k' and l', would be mapped as:

k'(-4, 6)→(6, 4)

l'(-3, 3)→(3, 3)