Question

1)(x+1) la puterea a2a-7=(x-1) la puterea a2a+1. Va rog ajutati-ma repede!
2) (x-2) la puterea a2a+x+4=(x-1) (x+1)

Answer 1

[tex](x+1)^2-7=(x-1)^2+1\\ x^2+2x+1-7=x^2-2x+1+1\\ 2x-6=-2x+2\\ 4x=8\\ x=2\\ (x-2)^2+x+4=(x-1)(x+1)\\ x^2-4x+4+x+4=x^2-1\\ -3x+8=-1\\ -3x=-9\\ x=3[/tex]
Am folosit formule de calcul prescurtat