What is (5x-x^2+3)+(12-7x-9x^2) ?

The solution to (5x-x^2+3)+(12-7x-9x^2) is -10x^2-2x+15

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simplify (5x-x^2+3)+(12-7x-9x^2)

simplify

(5 x - x^{2} + 3) + (12 - 7 x - 9 x^{2})

- 10 x^{2} - 2 x + 15

Solution steps

(5 x - x^{2} + 3) + (12 - 7 x - 9 x^{2})

Simplify

(5 x - x^{2} + 3) + (12 - 7 x - 9 x^{2}) : 5 x - x^{2} + 3 + 12 - 7 x - 9 x^{2}

= 5 x - x^{2} + 3 + 12 - 7 x - 9 x^{2}

Group like terms

= - x^{2} - 9 x^{2} + 5 x - 7 x + 3 + 12

Add similar elements:

- x^{2} - 9 x^{2} = - 10 x^{2}

= - 10 x^{2} + 5 x - 7 x + 3 + 12

Add similar elements:

5 x - 7 x = - 2 x

= - 10 x^{2} - 2 x + 3 + 12

Add the numbers:

3 + 12 = 15

= - 10 x^{2} - 2 x + 15

(- 10 + 4 i) + (- 4 - 9 i)

4 - (- 9)

ln (1)

(x - 1) (x - 3) (x + 2)

(- 2 h + 9) (9 h - 2)

What is (5x-x^2+3)+(12-7x-9x^2) ?
The solution to (5x-x^2+3)+(12-7x-9x^2) is -10x^2-2x+15