Question 564678
Multiply:
(9-√5)(3+√5)
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Use FOIL:
F: 27
O:9*sqrt(5)
I:-3*sqrt(5)
L: -5
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= 22 + 6sqrt(5)
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Multiply and simplify by factoring.
³√y^7 ³√16y^8
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= [16y^15]^(1/3)
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= [8y^15*2]^(1/3)
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= 2y^5*cbrt(2)
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Cheers,
Stan H.
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