Question

a) (x-1)^2 + (x+3)^2 - 2(x+2)(x-2) b) (2x+3)^2-4(x+1)(x+2) . Am nevoie de răspunsurile corecte.Mulțumesc anticipat !!

Answer 1

a)(x-1)^2+(x+3)^2-2(x+2)(x-2)
x^2-2x-1+x^2+6x+3^2-(2x+4)(x-2)
x^2-2x-1+x^2+6x+3^2-2x^2-4x+4x-8
4x+3^2-9
4x+9-9
4x+0
x=0÷4=0 ada cred ca e