How do you find zeros of y=−4x3+100x?
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Solution:
y = -4x³+100x
To find zeros of the polyomial, we must take y = 0
=> -4x³+100x = 0
=> -4x(x²-25) =0
=> -4x(x²-5²)=0
=> -4x(x+5)(x-5)=0
=> (-4x) = 0,or x+5=0 or x-5=0
=> x =0 Or x = -5 or x = 5
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