Using arithmetic operations, rewrite this polynomial in standard, simplest form.

(3x2 + 9x + 6) - (8x2 + 3x - 10) + (2x + 4) (3x - 7)

x2 + 4x - 12

x2 + 8x - 42

17x2 + 10x - 32

17x2 + 14x + 24

(3x2 + 9x + 6) - (8x2 + 3x - 10) + (2x + 4) (3x - 7)

First distribute the (2x+4) (3x-7) to get 6x2-2x-28

After this just add the like terms for all parts of the expression.

(3x2-8x2+6x2) + (9x-3x-2x) + (6+10-28)

x2+4x-12

So you answer is x2+4x-12