Question

16(x+y) square-25(x+3y) square

Answer 1

HERE IS YOUR ANSWER..⬇⬇

$16(x + y) {}^{2} - 25(x - 3y) {}^{2} \\ \\ = 16(x {}^{2} + 2xy + y {}^{2} ) - 25(x {}^{2} - 6xy + 9y {}^{2} ) \\ \\ = 16x {}^{2} + 32xy + 16y {}^{2} - 25x {}^{2} + 150xy - 225y {}^{2} \\ \\ = - 9x {}^{2} + 182xy + 209y {}^{2}$

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