SOLUTION: 1. Let f(x) = x^3 + 3x ^2 + 4x - 7 and g(x) = -7x^4 + 5x^3 +x^2 - 7. What is the coefficient of x^3 in the sum f(x) + g(x)?

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: 1. Let f(x) = x^3 + 3x ^2 + 4x - 7 and g(x) = -7x^4 + 5x^3 +x^2 - 7. What is the coefficient of x^3 in the sum f(x) + g(x)?       Log On


   

Question 1091538: 1. Let f(x) = x^3 + 3x ^2 + 4x - 7 and g(x) = -7x^4 + 5x^3 +x^2 - 7.
What is the coefficient of x^3 in the sum f(x) + g(x)?
Answer by Edwin McCravy(20060) About Me  (Show Source):
You can put this solution on YOUR website!
f(x) = x^3 + 3x ^2 + 4x - 7 and g(x) = -7x^4 + 5x^3 +x^2 - 7.
What is the coefficient of x^3 in the sum f(x) + g(x)?
Just line them up as below and add them vertically term by term:



Now all you have to do is look at the bottom line and see what the 
coefficient of x3 is!

Edwin