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Question
One factor of x4 + x2 − 20 is x2 + 5. The other factor is
Options
x2 − 4
x − 4
x2 − 5
x + 2
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Solution
It is given that `x^ + 5`is a factor of the polynomial
`f(x)^2 = x^4 + x^2 - 20 .`
Here, reminder is zero. Therefore,` x^2 - 4` is a factor of polynomial.
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