Question

factorizați expresia

${25x}^{2} + 40xy + {16y}^{2} =$
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Answer 1

$5 ^{2} \times + x^{2} + 2 \times 5x \times 4y + 4^{2} y^{2} < > (5x) + 2 \times 5x \times 4y + (4y)^{2} < > (5x + 4y)^{2}$