Question

(x+2) la patrat + (x-1 )la patrat

Answer 1

$(x+2)^{2} +(x-1)^{2}= x^{2} +4x+2^{2}+ x^{2} -2x-1^{2}= 2x^{2}+2x+3$

Answer 2

x la pătrat +2×x×2+2 la patrat + x la patrat - 2×x×1+ 1 la patrat = x la patrat +4x+4+x la patrat - 2x+ 1