Shayna enlarged a square photo by adding 10 inches to each side so it could be seen on a large poster. The area of the enlarged photo is 256 square inches. In the equation (x + 10)2 = 256, x represents the side measure of the original square photo.

Question

Vocaloid · Answer

Full question? If this is all they give you simple solve for x by taking the square root of both sides and isolating x

As a side note I disagree with that equation (should be (x + 20)^2 instead of 10 because you are adding 10 to all sides) but if that’s what they give you, work with that