Question

найдите корни уравнения (4x+5)(9x-1)=0

Answer 1

(4х + 5)(9х - 1) = 0
1) 4х + 5 = 0
4х = 0 - 5
4х = -5
х = -5 : 4
х = - 5/4 = - 1  1/4

2) 9х - 1 = 0
9х = 0 -1
9х = -1
х = -1 : 9
х = - 1/9