Question

respondam ai gente pfvr ​

Answer 1

Explicação passo-a-passo:

3)5x²-20x+20=5(x²-4x+4)= 5(x-2)²

4)x⁶-2x³+1= (x³-1)²

5)(2x+3)²=(2x)²+2•2x•3+3²= 4x²+12x+9

6)(2a+3b)²=(2a)²+2•2a•3b+(3b)²= 4a²+12ab+9b²

7)(x-y)²-(x+y)²=(-2y)•2x= -4xy

8)(-2x+3)²=(3-2x)²=9-12x+4x²=4x²-12x+9