Question

E(x,y)=4x^2+y^2-4x-2y+6 scris ca o suma de patrate perfecte

Answer 1

${4x}^{2} + {y}^{2} - 4x - 2y + 6$
$(2x - 1)^{2} + (y - 1)^{2} + (1 + 1) ^{2}$