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Popular >

expand (x+5)^3

Solution

expand

(x + 5)^{3}

Solution

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

Solution steps

(x + 5)^{3}

Apply Perfect Cube Formula:

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

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

= x^{3} + 3 x^{2} \cdot 5 + 3 x \cdot 5^{2} + 5^{3}

Simplify

x^{3} + 3 x^{2} \cdot 5 + 3 x \cdot 5^{2} + 5^{3} : x^{3} + 15 x^{2} + 75 x + 125

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

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Frequently Asked Questions (FAQ)

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