4x=x^2+6x+9, what do I do next? Subtract 4x?

asked Dec 9, 2018 983 views

5 votes

by Ozer

8.7k points

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3 votes

-x^2- 6x+ 4x -9=0
-x^2 - 2x -9=0
D= b^2 - 4ac= 4- 4*1*9= 4- 36= -32-> no solution

Kevin ABRIOUX answered Dec 12, 2018

8.2k points

5 votes

Yes. Subtract 4x by both sides.

So:
4x = x^2 + 6x + 9
0 = x^2 + 2x + 9
Then you can factorize
0 = (x+1)^2 + 8

Akathimi answered Dec 15, 2018

7.8k points

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