Solve 81-x^4 - ScanMath

Evaluate

81 - x^{4}

Rewrite the expression in exponential form

(8 1^{\frac{1}{2}})^{2} - (x^{2})^{2}

Use a^{2} - b^{2} = (a - b) (a + b) to factor the expression

(8 1^{\frac{1}{2}} - x^{2}) (8 1^{\frac{1}{2}} + x^{2})

Evaluate

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(9 - x^{2}) (8 1^{\frac{1}{2}} + x^{2})

Evaluate

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(9 - x^{2}) (9 + x^{2})

Solution

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(3 - x) (3 + x) (9 + x^{2})

Factor the expression