SOLUTION: If 4aČ-bČ=54, then 4(2a+b)(2a-b)= ? Thanks.

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Question 18301: If 4aČ-bČ=54, then 4(2a+b)(2a-b)= ?
Thanks.
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
4a%5E2-+b%5E2+=+54 Factor the left side.
%282a-b%29%282a%2Bb%29+=+54 Multiply both sides by 4.
4%282a-b%29%282a%2Bb%29+=+4%2854%29
4%282a%2Bb%29%282a-b%29+=+216