# Algebra

posted by Alexa

Evaluate sqrt7x (sqrt x-7 sqrt7) Show your work.

sqrt(7)*sqrt(x)-sqrt(7)*7*sqrt(7)
sqrt(7*x)-7*sqrt(7*7)
sqrt(7x)-7*sqrt(7^2)
x*sqrt 7x-49*x

^^^ would this be my final answer?

1. Reiny

Assuming you meant:

√7 x(√x - 7√7)
= x√(7x) - 49x

brackets are important here

e.g √(7x) vs √7x , the last one is (√7)x

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