Answer:
x = ± 5
Explanation:
Given
5a² - 44 = 81 ( add 44 to both sides )
5a² = 125 ( divide both sides by 5 )
a² = 25 ( take the square root of both sides )
a² = ± = ± 5
That is x = - 5 or x = 5
5a^2 - 44 = 81
Add 44 to both sides:
5a^2 = 125
Divide both sides by 5:
a^2 = 25
Take the square root of both sides:
a = 5
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= ± 5