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evergirl
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DrakeAndHisMind
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54

evergirl
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how did u do that though?

DrakeAndHisMind
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foiling


tcarroll010
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(a + b)(a  b) is the form of your expression.
You have to multiply that out:
a(a  b) + b(a  b) = a^2  ab + ab  b^2 = a^2  b^2

evergirl
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thanks

tcarroll010
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In this case, a is 8 and b is sqrt(10)