Solve 3x^2-4x-1=0 Can someone please explain to me how it went from 4 +/- the square root of 28 to 4 +/- 2 multiplied by the square root of 7.

Yanhao asked Sep 12, 2023

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Solve 3x^2-4x-1=0

Can someone please explain to me how it went from 4 +/- the square root of 28 to 4 +/- 2 multiplied by the square root of 7.

Yanhao asked Sep 12, 2023

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22 votes

square root of 28 is 2√7

√28 = √4 * √7 = 2√7

Chaska answered Sep 17, 2023

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