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Popular >

expand (7x-2)^3

Solution

expand

(7 x - 2)^{3}

Solution

343 x^{3} - 294 x^{2} + 84 x - 8

Solution steps

(7 x - 2)^{3}

Apply Perfect Cube Formula:

(a - b)^{3} = a^{3} - 3 a^{2} b + 3 a b^{2} - b^{3}

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

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

Simplify

(7 x)^{3} - 3 (7 x)^{2} \cdot 2 + 3 \cdot 7 x \cdot 2^{2} - 2^{3} : 343 x^{3} - 294 x^{2} + 84 x - 8

= 343 x^{3} - 294 x^{2} + 84 x - 8

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Frequently Asked Questions (FAQ)

What is expand (7x-2)^3 ?
The solution to expand (7x-2)^3 is 343x^3-294x^2+84x-8