Since you have the square root of x, you would need to square it to reverse the square root, and just have x. Then, you would have to square the 4 on the otherside, to get x=16
(1, 2)
plug 1 in for x and 2 in for y
2x1=2 is 2=2
Juanita did make an error, she should have combined -4 and -5 to make -9