Question

2) Simplifique as expressõe:
(x + 1)² + (x + 2)²=
5x - (2x + 3)²=
0,1 (x + 10)=​

Answer 1

$(x+1)^2+(x+2)^2= \\ (x^2+2*x*1+1^2)+(x^2+2*x*2+2^2)= \\ x^2+2x+1+x^2+4x+4= \\ 2x^2+6x+5$

$5x-(2x+3)^2= \\ 5x-(2^2x^2+2*2x*3+3^2)= \\ 5x-(4x^2+12x+9)= \\ 5x-4x^2-12x-9= \\ -4x^2-7x-9$

$0,1*(x+10)= \\ 0,1x + 1= \\ \frac{x}{10}+1$