Question

Решите уравнения: 1)4√х-7=0 2)√10х-9=4 3)30/√х-7=6 4)(х+6)^2=49 5)(х-5)^2=3

Answer 1

1)4√х-7=0

х = (7/4)² = 49/16 = 3 1/16

2)√10х-9=4

10х = 13² = 169

х = 16,9

3)30/√х-7=6

30/√х = 13

х = (30/13)² = 900/169 = 5 55/169

4)(х+6)^2=49

х+6 = √49 = ±7

х₁ = 1, х₂ = -13

5)(х-5)^2=3

х-5 = ±√3

х = 5 ±√3