Question

The solution set of √x-4=7 is​

Answer 1

√x - 4 =7
√x = 7- 4
√x = 3
squaring on both sides
x = (3)²
x = 9

Answer 2

Step-by-step explanation:

$\sqrt{x } - 4 = 7 \\ \sqrt{x} = 7 + 4 \\ \sqrt{x} = 11 \\ x = {11 }^{2} \\ x = 121$