SOLUTION: find the solution of x^2-21=4x. if the solution is a fraction, enter it in simplest form x= or x=

SOLUTION: find the solution of x^2-21=4x. if the solution is a fraction, enter it in simplest form x= or x=

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Question 188403: find the solution of x^2-21=4x. if the solution is a fraction, enter it in simplest form
x= or x=
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!

Subtract from both sides

Add to both sides

Use complete the square method

Take the square root of both sides

and

check the answers:

and

OK
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