how to extract the square roots

how to extract 2x²=20

and 4x²-100=0
in Algebra 1 Answers by

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1 Answer

1)

2x^2 = 20
x^2 = 20 / 2
x^2 = 10
x = +/-sqrt(10)
x= sqrt(10) or x = -sqrt(10)

2)

4x^2 - 100 = 0
4x^2 = 100
x^2 = 100 / 4
x^2 = 25
x = +/-sqrt(25)
x = 5 or x = -5
by

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