Question

Se alguém poder me passar as respostas e os cálculos valendo 10 pontos! urgente

Answer 1

a) (x+2)(x+2)=

=x²+2x+2x+4=

=x²`+4x+4

b) (3x-4)(3x-4)=

=9x²-12x-12x+16=

9x²-24x+16

c) (4+y)(4-y)=

=16-4y+4y-y=

=16-y

d) (5-2x)(5-2x)=

=25-10x-10x+4x²=

25-20x+4x²

e) (a+b)(a+b)=

=a²+ab+ab+b²=

a²+2ab+b²