First step is to square root the 25, which is 5. Then subtract the 4 from both sides to get √(2w+5) = 1. You then have to get rid of the square root by squaring both sides, this would lead to 2w + 5 = 1. You then subtracdt 5 from both sides to get 2w = 4 and then divide by 2 to get w = 2.
You can plug any answer you get back into the equation to see if you're right. So let's do that:
√(2(2)+5) + 4 = 5
√(4 + 5) + 4 = 5
√(1) + 4 = 5
1 + 4 = 5
5 = 5 *this is equal on both sides, therefore the correct answer!*
6/26/2014

Brian D.
Comments