A few days ago
lizard S

Math review help?

Okay I need a math review, what is (2 root x)^2? I think it is 4x but I don’t remimber. Thanks

Top 2 Answers
A few days ago
Twiggy

Favorite Answer

You`re right !

(2rt x)^2

=2rt x * 2rt x,

=2*2*rt x*rt x

=4x. Well done, take 10 extra Brownie points !

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A few days ago
MsMath
You’re right. It is 4x.

(2 sqrt(x))^2

= (2 sqrt(x)) (2 sqrt(x))

= (2*2) (sqrt(x*x))

= 4 (sqrt(x^2))

= 4x

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