What is expand (x^2+9x-9)(x^2-x+1) ?

The solution to expand (x^2+9x-9)(x^2-x+1) is x^4+8x^3-17x^2+18x-9

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expand (x^2+9x-9)(x^2-x+1)

expand

(x^{2} + 9 x - 9) (x^{2} - x + 1)

x^{4} + 8 x^{3} - 17 x^{2} + 18 x - 9

Solution steps

(x^{2} + 9 x - 9) (x^{2} - x + 1)

Distribute parentheses

= x^{2} x^{2} + x^{2} (- x) + x^{2} \cdot 1 + 9 x x^{2} + 9 x (- x) + 9 x \cdot 1 - 9 x^{2} - 9 (- x) - 9 \cdot 1

Simplify

x^{2} x^{2} + x^{2} (- x) + x^{2} \cdot 1 + 9 x x^{2} + 9 x (- x) + 9 x \cdot 1 - 9 x^{2} - 9 (- x) - 9 \cdot 1 : x^{4} + 8 x^{3} - 17 x^{2} + 18 x - 9

= x^{4} + 8 x^{3} - 17 x^{2} + 18 x - 9

36 + 9

cos^{2} (θ)

(x + 2)^{2} + 4

(x - 9) (x - 4)

lo g_{10} (4) (\frac{1}{64})

What is expand (x^2+9x-9)(x^2-x+1) ?
The solution to expand (x^2+9x-9)(x^2-x+1) is x^4+8x^3-17x^2+18x-9