fortytwo
What is the expression in factored form?
5x2 – 80y2



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wio
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\[
a^2  b^2 = (ab)(a+b)
\]

fortytwo
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what do you do after that

wio
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What did you get?

seidi.yamauti
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80y2 is 80y²?

fortytwo
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yes it is, and i got 6375=6375, so the answer is (5+80)(580)?

fortytwo
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@wio

wio
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Umm, first of all, where is your x and y?

wio
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Actually, first of all, what are you choosing for a and b?

fortytwo
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5 and 80

precal
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dw:1356576196048:dw

precal
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factor out 5 first

fortytwo
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okay, thank you so much, that was alot simpler than I thought.

precal
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yw