Homework Help

1. If f(x)=3x-4 and g(x)=x+2: find f-g 2. If f(x)=3x-4 and g(x) = x+2: find f-g Will...

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zigtozag | Student, College Freshman | eNotes Newbie

Posted January 17, 2009 at 5:03 AM via web

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1. If f(x)=3x-4 and g(x)=x+2: find f-g

2. If f(x)=3x-4 and g(x) = x+2: find f-g

Will someone help me solve these 2 problems and get the correct answers, my answers were incorrect.

my answers were:

1. x+2

2. 2x+2

6 Answers | Add Yours

Top Answer

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giorgiana1976 | College Teacher | Valedictorian

Posted January 18, 2009 at 9:43 PM (Answer #1)

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f(x)=3x-4   g(x)=x+2

f(x)-g(x)=3x-4-x-2

Gathering the terms in x together and the free ones together, the result will be:

f(x)-g(x)= (3x-x)+(-4-2)=2x-6

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miguel0506 | Student, Grade 9 | eNotes Newbie

Posted March 6, 2009 at 8:50 AM (Answer #2)

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*f(x)=3x-4    *g(x)=x+2

 

*f(x)-g(x)=3x4-x-2

*you have put x and the free ones together, my result is>>>

f(x)-g(x)= (3x-x)+(-4-2)=2x-6 that is my answer but 3x-x if you want not put () ok...bye..

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hardforme2 | Student, College Freshman | eNotes Newbie

Posted March 1, 2010 at 1:20 AM (Answer #3)

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if f(x)=2xsquare-x-3 and g(x)=x+1 find f=g

i came up with 2xsuare-2

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revolution | College Teacher | Valedictorian

Posted July 21, 2010 at 10:49 PM (Answer #4)

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1) Given that f(x)= 3x-4  and g(x)= x+2

To find f-g:

f(x)-g(x)= 3x-4-(x+2)

= 3x-4-x-2

= 2x-6, so your answer is wrong.

I think maybe you type wrongly for the 2nd problem, it is the same as the first one.

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atyourservice | Student, Grade 10 | Valedictorian

Posted May 29, 2014 at 11:20 PM (Answer #5)

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If f(x)=3x-4 and g(x)=x+2: find f-g

just combine

f(x) - g(X) = 3x - 4 - (x +2)

f(x) - g(X) = 3x - 4 - x - 2

combine like terms

f(x) - g(X) = 3x - x - 4 - 2

f(x) - g(X) = 2x - 6

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maria-vivanco | Student, Grade 11 | Valedictorian

Posted July 30, 2014 at 10:18 PM (Answer #6)

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To do f-g you would combine both functions: 

(3x-4)-(x+2)

you combine like terms getting: 

2x-6

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