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Popular >

expand x^2(x-9)(x+9)

Solution

expand

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

Solution

x^{4} - 81 x^{2}

Solution steps

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

Expand

x^{2} (x - 9) (x + 9) : x^{2} (x^{2} - 81)

= x^{2} (x^{2} - 81)

Apply the distributive law:

a (b - c) = ab - a c

x^{2} (x^{2} - 81) = x^{2} x^{2} - x^{2} \cdot 81

= x^{2} x^{2} - x^{2} \cdot 81

Simplify

x^{2} x^{2} - x^{2} \cdot 81 : x^{4} - 81 x^{2}

= x^{4} - 81 x^{2}

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Frequently Asked Questions (FAQ)

What is expand x^2(x-9)(x+9) ?
The solution to expand x^2(x-9)(x+9) is x^4-81x^2