Question

Descompuneti in factori: 4(a+1)la puterea a 2a -9
25(2x+1)la puterea a 2-a -16
4(2x-3)la puterea a 2-a -9

Answer 1

4(a+1)²-9 =[2(a+1)-3][2(a+1)+3]=(2a+2-3)(2a+2+3)=(2a-1)(2a+5)25(2x+1)²-16=[5(2x+1)-4][5(2x+1)+4]=(10x+5-4)(10x+5+4)=

=(10x+1)(10x+9)

4(2x-3)²-9=[2(2x-3)-3][2(2x-3)+3]=(4x-6-3)(4x-6+3)=(4x-9)(4x-3)