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Popular >

expand (7a-b)^2

Solution

expand

(7 a - b)^{2}

Solution

49 a^{2} - 14 ab + b^{2}

Solution steps

(7 a - b)^{2}

Apply Perfect Square Formula:

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

(7 a - b)^{2} = (7 a)^{2} - 2 \cdot 7 ab + b^{2}

= (7 a)^{2} - 2 \cdot 7 ab + b^{2}

Simplify

(7 a)^{2} - 2 \cdot 7 ab + b^{2} : 49 a^{2} - 14 ab + b^{2}

= 49 a^{2} - 14 ab + b^{2}

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Frequently Asked Questions (FAQ)

What is expand (7a-b)^2 ?
The solution to expand (7a-b)^2 is 49a^2-14ab+b^2