For this case we have the following equation:
x2 + 4x = 14
By completing squares we have:
x2 + 4x + (4/2) ^ 2 = 14 + (4/2) ^ 2
Rewriting we have:
x2 + 4x + (2) ^ 2 = 14 + (2) ^ 2
x2 + 4x + 4 = 14 + 4
x2 + 4x + 4 = 18
(x + 2) ^ 2 = 18
Answer:
A. (x + 2) 2 = 18
I guess its like this
|x+4|=2
x+4=2
2=2
the two will cancel out
so than you will do 4+2 which equal 6
which makes it x+6
which probably make it
×=7 Im not sure though
Change the sales tax to a decimal which would be 0.085 and multiply that by 505.95$ to get 43$ which is the sales tax, then add that to the original amount 505.95$ to get the total cost after tax which is 548.96$ rounded to the nearest cent.