👤

(x+2y) la a doua va rog reepede

Răspuns :

( x + 2y)² = x² + 2 × x × 2y + (2y)² = x² + 4xy + 4y²

(x+2y)^2=x^2 + 2×x×2y+(2y)^2=x^2+4xy+4y^2

"^" inseamna la puterea