Solve the quadratic equation by square roots:

1. 4x²= 81
2. (4x-3)²+7=39

see explanation

Step-by-step explanation:

(1)

given

4x² = 81 ( divide both sides by 4 )

x² = ( take the square root of both sides )

x = ± = ±

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(2)

subtract 7 from both sides

(4x - 3)² = 32 ( take the square root of both sides )

4x - 3 = ± = ± 4

Add 3 to both sides

4x = 3 ± 4 ( divide both sides by 4 )

x = ±

the answer is d

step-by-step explanation:

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step-by-step explanation:

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