What is expand 3x^2-6x+7+5x^2+2x-9 ?

The solution to expand 3x^2-6x+7+5x^2+2x-9 is 8x^2-4x-2

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expand 3x^2-6x+7+5x^2+2x-9

expand

3 x^{2} - 6 x + 7 + 5 x^{2} + 2 x - 9

8 x^{2} - 4 x - 2

Solution steps

3 x^{2} - 6 x + 7 + 5 x^{2} + 2 x - 9

Group like terms

= 3 x^{2} + 5 x^{2} - 6 x + 2 x + 7 - 9

Add similar elements:

3 x^{2} + 5 x^{2} = 8 x^{2}

= 8 x^{2} - 6 x + 2 x + 7 - 9

Add similar elements:

- 6 x + 2 x = - 4 x

= 8 x^{2} - 4 x + 7 - 9

Add/Subtract the numbers:

7 - 9 = - 2

= 8 x^{2} - 4 x - 2

- \frac{2 ( x - 1 )}{7}

\frac{1}{x ( 4 - x )}

(8 r^{3} + 6 r + 5) (r^{2} + 1) d x

2 (e d + e)

3 (x - 1)^{2} \cdot ln (2 x)

What is expand 3x^2-6x+7+5x^2+2x-9 ?
The solution to expand 3x^2-6x+7+5x^2+2x-9 is 8x^2-4x-2