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Popular >

expand (a-2b)^2

Solution

expand

(a - 2 b)^{2}

Solution

a^{2} - 4 ab + 4 b^{2}

Solution steps

(a - 2 b)^{2}

Apply Perfect Square Formula:

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

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

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

Simplify

a^{2} - 2 a \cdot 2 b + (2 b)^{2} : a^{2} - 4 ab + 4 b^{2}

= a^{2} - 4 ab + 4 b^{2}

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Frequently Asked Questions (FAQ)

What is expand (a-2b)^2 ?
The solution to expand (a-2b)^2 is a^2-4ab+4b^2