What is the answer to 21=(x+3)2

1 answer:

3 0

First, distribute 2 to the (x+3) to get:
21 = 2x+6
subtract 6 from both sides to get:
15 = 2x
Finally, we divide both sides by 2 to simplify x to:
x = 7.5 (OR) x = $7 \frac{1}{2}$
(Just so you know, if you pick a brainliest answer, both you and the person who got the brainliest answer get some points.

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See the attached picture for all the work.