Question

решите уравнение:
(5c + 8)² - (c - 10)² = 0

Answer 1

$(5c+8)^2-(c-10)^2=0 \ (5c+8-c+10)(6c-2)=0 \ (4c+18)*2(3c-1)=0 \ 2(2c+9)*2(3x-1)=0 \ (2c+9)(3c-1)=0 \ \ left { {{2c+9=0} atop {3c-1=0}} right.== textgreater left { {{c=- frac{9}{2} } atop {c= frac{1}{3} }} right.$

Ответ: c1=-9/2; c2=1/3