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Popular >

expand (5x-1)^3

Solution

expand

(5 x - 1)^{3}

Solution

125 x^{3} - 75 x^{2} + 15 x - 1

Solution steps

(5 x - 1)^{3}

Apply Perfect Cube Formula:

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

(5 x - 1)^{3} = (5 x)^{3} - 3 (5 x)^{2} \cdot 1 + 3 \cdot 5 x \cdot 1^{2} - 1^{3}

= (5 x)^{3} - 3 (5 x)^{2} \cdot 1 + 3 \cdot 5 x \cdot 1^{2} - 1^{3}

Simplify

(5 x)^{3} - 3 (5 x)^{2} \cdot 1 + 3 \cdot 5 x \cdot 1^{2} - 1^{3} : 125 x^{3} - 75 x^{2} + 15 x - 1

= 125 x^{3} - 75 x^{2} + 15 x - 1

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Frequently Asked Questions (FAQ)

What is expand (5x-1)^3 ?
The solution to expand (5x-1)^3 is 125x^3-75x^2+15x-1