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Popular >

expand (42-x)^2

Solution

expand

(42 - x)^{2}

Solution

1764 - 84 x + x^{2}

Solution steps

(42 - x)^{2}

Apply Perfect Square Formula:

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

(42 - x)^{2} = 4 2^{2} - 2 \cdot 42 x + x^{2}

= 4 2^{2} - 2 \cdot 42 x + x^{2}

Simplify

4 2^{2} - 2 \cdot 42 x + x^{2} : 1764 - 84 x + x^{2}

= 1764 - 84 x + x^{2}

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Frequently Asked Questions (FAQ)

What is expand (42-x)^2 ?
The solution to expand (42-x)^2 is 1764-84x+x^2