Question 615589
1.5xcubed-40xsquared+80x
= 5x(x^2-8x+16)
= 5x(x-4)(x-4)
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2.5sto the fourth=125s
5s^4-125s = 0
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5s(s^3-25) = 0
s = 0 or s = 25^(1/3)
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cheers,
Stan H.
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