Solve y^4 - 81 - ScanMath

Evaluate

y^{4} - 81

Rewrite the expression in exponential form

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

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

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

Evaluate

More Steps

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

Evaluate

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

Solution

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

Factor the expression