What is 3x^2+6-2x+5x-4x^2+9 ?

The solution to 3x^2+6-2x+5x-4x^2+9 is -x^2+3x+15

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simplify 3x^2+6-2x+5x-4x^2+9

simplify

3 x^{2} + 6 - 2 x + 5 x - 4 x^{2} + 9

- x^{2} + 3 x + 15

Solution steps

3 x^{2} + 6 - 2 x + 5 x - 4 x^{2} + 9

Add similar elements:

- 2 x + 5 x = 3 x

= 3 x^{2} + 6 + 3 x - 4 x^{2} + 9

Group like terms

= 3 x^{2} - 4 x^{2} + 3 x + 6 + 9

Add similar elements:

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

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

Add the numbers:

6 + 9 = 15

= - x^{2} + 3 x + 15

cos (x) (sec (x) - cos (x))

\frac{cos ( - x )}{tan ( - x )} + sin (- x)

x^{5} + x^{2} - x - 1

(52 + 1) (52 - 1)

\frac{3}{5} \cdot \frac{4}{5}