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How do you solve #sqrt(x-1) = 7#?

Answer 1

Avery Alexander

#x=50#

To undo a square root, use square.

#sqrt(x-1)=7#

#(sqrt(x-1))^2=7^2#

There is no longer a factor for the square root:

#x-1=49#

#x=50#

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Answer 2

Julia Adams

To solve the equation sqrt(x-1) = 7, you can square both sides of the equation to eliminate the square root. This gives you x-1 = 49. Then, you can isolate x by adding 1 to both sides of the equation, resulting in x = 50. Therefore, the solution to the equation sqrt(x-1) = 7 is x = 50.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.