pLEASE CHECK MY WORK TO SEE IF i AM CORRECT
28x^2-6x+1
28(-4)^2-6(4)+1

Then I need help

Question

pLEASE CHECK MY WORK TO SEE IF i AM CORRECT
28x^2-6x+1
28(-4)^2-6(4)+1

Then I need help

anonymous · Answer

(gof) (-4)

amistre64 · Answer

you need to use -4 in each x spot ...

anonymous · Answer

I thought that I did that above
28(-4)-6(-4)+1  right

anonymous · Answer

sorry for got the 28(-4)^2

amistre64 · Answer

better, and remember that -*- = +

anonymous · Answer

so that would be 28*4=112^2 right

amistre64 · Answer

28(-4)^2 -6(-4) + 1

28(16) +24  + 1

280 + 120 + 48 +25

amistre64 · Answer

28*4 = 80 + 32 = 112 yes

anonymous · Answer

so 112-24+1=89 but my test said that was wrong so would you add 112+24+1

amistre64 · Answer

the 112 still needs to be multiplied by the other 4

amistre64 · Answer

112*4 = 400+40+8

anonymous · Answer

so 448

amistre64 · Answer

and its not -24 ..  -6(-4) = 24,  to negatives gets a postive

anonymous · Answer

that is right two negatives make positive so the answer would be 448 correct

amistre64 · Answer

448 + 24 + 1 = ?

anonymous · Answer

the answer was 473???

anonymous · Answer

Ok I have four problems that goes with the pair of functions can you help me and I wont bug you no more tonight

amistre64 · Answer

448 + 24 + 1

468 + 4 + 1

472 + 1 = 473

amistre64 · Answer

i cant make that promise, its getting late over here where i am and il have to leave soon

anonymous · Answer

f(x)=3x
g(x)=7x^2-4x+6

amistre64 · Answer

post it up as a new question and see if anyone bites :)