Question

(x+2)la patrat - (2-x)la patrat +1=4-3x

Answer 1

(x+2)²-(2-x)²+1=4-3x
(x+2)² daca ai invatat la scoala calcule prescurtate este cam asa
x²+2x+2² cum am facut uite asa: (x+2)(x+2) verifica si asa iti da
si cealalta =>2²-2x+x²
x²+2x+2²-2²-2x+x²+1=4-3x
Acum le grupam
x²+x²+2x-2x+2²-2²+1=4-3x
2x²+1=4-3x
2x²=3-3x
3=2x²+3x