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Popular >

expand (x-9y)^2

Solution

expand

(x - 9 y)^{2}

Solution

x^{2} - 18 x y + 81 y^{2}

Solution steps

(x - 9 y)^{2}

Apply Perfect Square Formula:

(a - b)^{2} = a^{2} - 2 ab + b^{2}

(x - 9 y)^{2} = x^{2} - 2 x \cdot 9 y + (9 y)^{2}

= x^{2} - 2 x \cdot 9 y + (9 y)^{2}

Simplify

x^{2} - 2 x \cdot 9 y + (9 y)^{2} : x^{2} - 18 x y + 81 y^{2}

= x^{2} - 18 x y + 81 y^{2}

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Frequently Asked Questions (FAQ)

What is expand (x-9y)^2 ?
The solution to expand (x-9y)^2 is x^2-18xy+81y^2