Question

(x+1)²-2(x-3)²+(x+2)² ​

Answer 1

Respuesta:

$(x + 1)^2 - 2(x- 3 )^2 + (x + 2)^2\\\\(x^2 + 2(x)(1) + 1) - 2(x^2 - 2(x)(3) + 3^2) + (x^2 + 2(x)(2) + 2^2)\\\\x^2 + 2x + 1 - 2(x^2 - 6x + 9) + (x^2 + 4x + 4)\\\\x^2 + 2x + 1 - 2x^2 + 12x - 18 + x^2 + 4x +4\\\\18x - 13$

Explicación paso a paso: