Question

If x2 - 4 = 45, then x could be equal to 9 3 5 -7 -4

Answer 1

Hi:))

x² - 4 = 45

X² = 45 + 4

X² = 49

√x² = √49

x = 7

Answer 2

$x^{2} - 4 = 45$

$x^{2}$ = 45 + 4

$x^{2}$ = 49

$\sqrt{ x^{2} } = \sqrt{49}$

x = 7