Question

Ajuda aeee

(2y-15b)²

Answer 1

$= (2y - 15b) {}^{2}$

$= (2y) {}^{2} - 2 \: . \: 2y \: . \: 15b + (15b) {}^{2}$

$\boxed{ = 4y {}^{2} - 60by + 225b {}^{2} }$

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