Answer:
Step-by-step explanation:
[tex]F\left[X] = 5X +7X -2 =12X-2\\[/tex]
[tex]g\left[x] = -2x^2+4x+5 \\[/tex]
[tex]f(x) - g(x) \\= 12x -2 - ( -2x^2+4x+5)\\=12x-2+2x^2-4x-5\\=2x^2 + 8x -7[/tex]
Answer:
2x^2+8x-7
Step-by-step explanation:
Combine like terms 5x+7x in your f(x) equation.
f(x) = 12x-2 then subtract g(x) from f(x).
12x-2-(-2x^2+4x+5)
Now distribute the negative to everything in the parenthses to change the signs.
12x-2+2x^2-4x-5.
Now, combine like terms. 12x-4x=8x
Combine -2-5=-7
Next, order expression beginning with largest exponent:
Your answer: 2x^2+8x-7.
