how to solve the question

how to solve the question

(2x-3x^2+9)-(5+x^2-8x) As a part of the answer, I keep getting -6x instead of 10x. How do I get 10x into my answer. Please explain. The answer I get is: -6x+(-4x^2)+4 I...

The number of pounds (in millions) of shrimp (S) and lobster (L) consumed in the US from 1980 to 1990 can be modeled by S=42.8t+425 and L=-1.5t^2+20.7t+194.5 where t=0 for 1980. Find the...

f(x)=3x^3-5x^2+9x+7 g(x)=2x^3+11x-15

(3x^3-8x^2+8) - (8-8x^2+8x^3)

what is the polynomial form of x^2-9x-3

i just need help

i need help

(3x2+ x +7)-(2x2+x+2)

(2X2-5X-1)+(3X2-7X+3)+(-5X2+X+1) =

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