Question

Please answer it fast. It's urgent.

Answer 1

Answer:

8m^2 + 2mn - 15n^2

where m = a+1 and n = b+2

using middle term factorisation

8m^2 + 12mn - 10mn -15n^2

4m(2m +3n) - 5n(2m + 3n)

(2m + 3n) (4m - 5n)

[ 2(a+1) + 3(b+2) ] [ 4(a+1) - 5(b+2) ]

(2a + 2 + 3b + 6) (4a + 4 - 5b -10)

(2a + 3b + 8) (4a - 5b - 6)

Step-by-step explanation: