Describe 11

Describe and correct the error in finding the difference function of (f-g) (x) of f(x) =(x²+3x-1) and g(x) =(x²+x+2)
(f-g) (x) =f(x)-g(x) =(x²+3x-1) - (x²+x+2)
=x²+3x-1 -x²+x+2
=x²-x²+3x+x-1+2
=4x+1

Correct answer:

d = 2x+3

Step-by-step explanation:

 f(x) =(x2+3x−1) g(x) =(x2+x+2) d(x) =f(x)−g(x) =(x2+3x−1) − (x2+x+2) d =x2+3x−1 −x2−x−2 d=x2−x2+3x−x−1−2 d=2x+3

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Dr Math
minus before parentheses apply to invert all signs (plus, minus) in bracket.





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