SOLUTION: If sqrt(28) + sqrt(7) = sqrt(A). Find A

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Question 1112950: If sqrt(28) + sqrt(7) = sqrt(A). Find A
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
If sqrt(28) + sqrt(7) = sqrt(A). Find A
:
sqrt%28A%29 = sqrt%2828%29+%2B+sqrt%287%29
Factor 28 to reveal a perfect square
sqrt%28A%29 = sqrt%284%2A7%29+%2B+sqrt%287%29
extract the square root of 4
sqrt%28A%29 = 2%2Asqrt%287%29+%2B+sqrt%287%29
Add like terms
sqrt%28A%29 = 3%2Asqrt%287%29
square both sides
A = 9(7)
A = 63