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Popular >

expand (5+x)^3

Solution

expand

(5 + x)^{3}

Solution

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

Solution steps

(5 + x)^{3}

Apply Perfect Cube Formula:

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

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

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

Simplify

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

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

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Frequently Asked Questions (FAQ)

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