Let f(x)= 5x(squared) - 4x+2 or g(x)=4x-6

Question

Find (f+g)(x) =

Find (f*g) = 

Answer 1

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(f+g)(x) = f(x) + g(x) = 5x² -4x +2 +4x - 6 = 5x² -4.

 

(f*g)(x) = f(x)*g(x) = (5x² - 4x + 2)*(4x - 6) = 5x³ -16x² + 8x -30x² + 24x - 12 =

 

5x³ - 46 x² +32x - 12.