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Popular >

expand (7x-3y)^2

Solution

expand

(7 x - 3 y)^{2}

Solution

49 x^{2} - 42 x y + 9 y^{2}

Solution steps

(7 x - 3 y)^{2}

Apply Perfect Square Formula:

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

(7 x - 3 y)^{2} = (7 x)^{2} - 2 \cdot 7 x \cdot 3 y + (3 y)^{2}

= (7 x)^{2} - 2 \cdot 7 x \cdot 3 y + (3 y)^{2}

Simplify

(7 x)^{2} - 2 \cdot 7 x \cdot 3 y + (3 y)^{2} : 49 x^{2} - 42 x y + 9 y^{2}

= 49 x^{2} - 42 x y + 9 y^{2}

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Frequently Asked Questions (FAQ)

What is expand (7x-3y)^2 ?
The solution to expand (7x-3y)^2 is 49x^2-42xy+9y^2