Question

Решите уравнение: (3х+5)(3х-5)-(3х-1)квадрат=10

Answer 1

(3х+5)(3х-5)-(3х-1)²=10
(3x)²-5²-((3x)²-2*3x+1)=10
9x²-25-9x²+6x-1=10
6x-26=10
6x=10+26
6x=36
x=6