Question

Dau coroana!!!!!!!!!!!!!!!!!!!!!Descompuneti in factori 9(x-2)²-4x²=?;(9a-6).(a+8)-3a.(a+8)=

Answer 1

9(x-2)²-4x²= [3*(x-2)-2x]* [3*(x-2)+2x]= (3x-6-2x)(3x-6+2x)=(x-6)(5x+6)

(9a-6)*(a+8)-3a*(a+8)= (a+8)*(9a-6-3a)=(a+8)(6a-6)=6*(a+8)(a-1)