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Popular >

expand (2a-5b)^2

Solution

expand

(2 a - 5 b)^{2}

Solution

4 a^{2} - 20 ab + 25 b^{2}

Solution steps

(2 a - 5 b)^{2}

Apply Perfect Square Formula:

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

(2 a - 5 b)^{2} = (2 a)^{2} - 2 \cdot 2 a \cdot 5 b + (5 b)^{2}

= (2 a)^{2} - 2 \cdot 2 a \cdot 5 b + (5 b)^{2}

Simplify

(2 a)^{2} - 2 \cdot 2 a \cdot 5 b + (5 b)^{2} : 4 a^{2} - 20 ab + 25 b^{2}

= 4 a^{2} - 20 ab + 25 b^{2}

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Frequently Asked Questions (FAQ)

What is expand (2a-5b)^2 ?
The solution to expand (2a-5b)^2 is 4a^2-20ab+25b^2