Question

16-9(a+b)² factorise the following​

Answer 1

Answer:

16-9(a+b)^2

=(4)^2-{3(a+b)}^2

=(4)^2-(3a+3b)^2

={4+(3a+3b)}{4-(3a+3b)}

=(4+3a+3b)(4-3a-3b)

Answer 2

Answer:

16-9(a+b)^2

16-9(a+b)(a+b)

16-9(a+b)(a+b) 16-9(a(a+b)+b(a+b))

16-9(a^2+an+b(a+b)

16-9a^2-18ab-9b^=-9a^-18ab-9b^+16