Find a factor of the polynomial q(x), if 4 and 0 are both solutions to the equation q(x)=0
A
x2
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B
(x−4)2
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C
x2+4x
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D
x2−8x
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E
x2−4x
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Solution
The correct option is Ex2−4x Since 4 is solution of q(x), (x−4) is a factor of q(x) and 0 is also solution of q(x), (x−0) is a factor of q(x). So, x(x−4)=x2−4x is a factor of q(x).