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Popular >

expand (9x-3y)^2

Solution

expand

(9 x - 3 y)^{2}

Solution

81 x^{2} - 54 x y + 9 y^{2}

Solution steps

(9 x - 3 y)^{2}

Apply Perfect Square Formula:

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

(9 x - 3 y)^{2} = (9 x)^{2} - 2 \cdot 9 x \cdot 3 y + (3 y)^{2}

= (9 x)^{2} - 2 \cdot 9 x \cdot 3 y + (3 y)^{2}

Simplify

(9 x)^{2} - 2 \cdot 9 x \cdot 3 y + (3 y)^{2} : 81 x^{2} - 54 x y + 9 y^{2}

= 81 x^{2} - 54 x y + 9 y^{2}

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Frequently Asked Questions (FAQ)

What is expand (9x-3y)^2 ?
The solution to expand (9x-3y)^2 is 81x^2-54xy+9y^2