(x-4)^2-9=0 — step-by-step solution | Explain MAths

(x-4)^2-9=0

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ℝ

:

{(x - 4)}^{2} - 9 = 0

{(x - 4)}^{2} = 9

x - 4 = -3

Solution obtained:

x = 1

x - 4 = 3

Solution found:

x = 7

▶Solution:

x = {1, 7}