Question

Алгебра, найти значения и спростить

Answer 1

$84xy- (6x+7y)^{2} =$ $84xy- 36^{2}-84xy-49^{2}=-(36^{2}+49^{2})$

$(x-10)^{2}-x(x+80)= x^{2} -20x+100- x^{2} -80x=100-100x=$ 10-350=-250

Answer 2

v konce 100-350=-250