Question

25хsquare + 9у square - 30 ху,​

Answer 1

Step-by-step explanation:

$25x {}^{2} + 9y {}^{2} - 30xy \\ = 25x {}^{2} - 30xy + 9y {}^{2} \\ = (5x) {}^{2} - 2 \times 5x \times 3y + (3y) {}^{2} \\ = (5x - 3y) {}^{2} \\ = (5x - 3y)(5x - 3y)$

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