Adding and subtracting polynomials

Adding and subtracting polynomials

how to solve the question

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...

(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...

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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