Question

Решите 7х2-5х=0 4х2=9

Answer 1

Если x2 - это x^2, то:
1. 7*x^2 - 5x = 0
    x(7x - 5) = 0
    x = 0
    x = 5/7
2. 4*x^2 = 9
    x^2 = 9/4
    x = 3/2
    x = -3/2