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Popular >

factor x^4-x^2-20

Solution

factor

x^{4} - x^{2} - 20

Solution

(x^{2} + 4) (x^{2} - 5)

Solution steps

x^{4} - x^{2} - 20

Let

u = x^{2}

= u^{2} - u - 20

Factor

u^{2} - u - 20 : (u + 4) (u - 5)

= (u + 4) (u - 5)

Substitute back

u = x^{2}

= (x^{2} + 4) (x^{2} - 5)

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Frequently Asked Questions (FAQ)

What is factor x^4-x^2-20 ?
The solution to factor x^4-x^2-20 is (x^2+4)(x^2-5)