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Popular >

expand (y-7)^3

Solution

expand

(y - 7)^{3}

Solution

y^{3} - 21 y^{2} + 147 y - 343

Solution steps

(y - 7)^{3}

Apply Perfect Cube Formula:

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

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

= y^{3} - 3 y^{2} \cdot 7 + 3 y \cdot 7^{2} - 7^{3}

Simplify

y^{3} - 3 y^{2} \cdot 7 + 3 y \cdot 7^{2} - 7^{3} : y^{3} - 21 y^{2} + 147 y - 343

= y^{3} - 21 y^{2} + 147 y - 343

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Frequently Asked Questions (FAQ)

What is expand (y-7)^3 ?
The solution to expand (y-7)^3 is y^3-21y^2+147y-343