Question

simplify the following (7x-9y)²+(7x+9y)²​

Answer 1

$(7x - 9y) {}^{2} + (7x + 9y) {}^{2}$

$(7x - 7x) {}^{2} (9y + 9y) {}^{2}$

$(7x {}^{2} ) {}^{2} (9y {}^{2} ) {}^{2}$