SOLUTION: i'm confused how to do this problem. please help 49 a⁴ - 9 bē Factor completely:

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Question 387240: i'm confused how to do this problem. please help
49 a⁴ - 9 bē Factor completely:
Found 3 solutions by edjones, robertb, nerdybill:
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
49a^4-9b^2
=(7a^2+3b)(7a^2-3b)
.
Ed

Answer by robertb(5830) About Me  (Show Source):
Answer by nerdybill(7384) About Me  (Show Source):
You can put this solution on YOUR website!
49a%5E4+-+9b%5E2
can be rewritten as:
%287a%5E2%29%5E2+-+%283b%29%5E2
This is now a "difference of squares" which factors out as:
%287a%5E2-+3b%29%287a%5E2+%2B+3b%29