Question

Помогите пожалуйста!!!!!!

Answer 1

1)

$a) 5x^{2} *(-3x^{3} )^{2} = 5x^{2}* 9x^{6} =45x^{8}$

$b) (2x-1)^{2} +(2x-1)(2x+1) = 4x^{2} -4x+1 +4x^{2} -1 = 8x^{2} -4x$

2)

$a) b^{2} c-9c = c(b^{2} -9) = c(b+3)(b-3)$

$b) 2a^{2} +12a+18 = 2(a^{2} +6a+9) = 2(a+3)^{2}$