Hello, I need help with these three problems I'm not good with this so I'd appreciate help :)

1st question:

2nd Question:

3rd question (this looks sooo difficult!):

Guest Mar 12, 2019

edited by
Guest
Mar 12, 2019

#1**+1 **

Only the last one is actually tough....the notation may be giving you trouble......

First one

(f + g)(x) means f(x) + g(x) = [ 5x^2 - 2x ] + [ 3x^2 + x - 4 ] = 8x^2 - x - 4

Second

(f * g) (x) means f(x) * g(x) =

[ 3x^2 + 5 ] * [ x - 2 ] =

3x^3 - 6x^2 + 5x - 10

Last one

(f / g)(x) = f(x) / g(x)

[ hint : factor the denominator first....see if you can use one of these factors in the numerator !!!]

4x^2 + 19x - 5 (4x - 1)(x + 5) x + 5

____________ = ____________ = ______

4x^2 - x x(4x - 1) x

Note that either x = 0 or x = 1/4 makes the second denominator 0....so...we can't have these values of x

So...... third answer !!!

CPhill Mar 12, 2019