Q.7. Factorise the following:
(a) a’x – x4 + a²x2 = ax?
(b) 4×4 + 12x} + 9x?​

A) a2 x 2+(ax2 +1)x+aa 2 x2+ax 3+x+a=ax 2

(a+x)+1(a+x)=(ax 2+1)(a+x)

B) 4x 2 +12x+9

⇒4x 2 +6x+6x+9

⇒2x(2x+3)+3(2x+3)

⇒(2x+3)(2x+3)