Question

Find the value of –4[g(2)] if g(x) = x2 – 5x.

Answer 1

@gabbyalicorn

Answer 2

Sorry, I'm not very good at math...

Answer 3

oh, wrong person @gabbyalicorn sorry

Answer 4

thx for helping @geerky42

Answer 5

First, we need to find g(2).

To find g(2), plug x=2 into g(x)

\(g(x) = x^2+5x\\~\\ g(\color{red}{\textbf{2}}) = (\color{red}{\textbf{2}})^2+5(\color{red}{\textbf{2}})\)

Answer 6

What is \(2^2+5\cdot2\)?

Answer 7

14

Answer 8

@geerky42

Answer 9

Right. So \(g(2) = 14\)

Now what is \(\text-4[g(2)]\)?

Answer 10

It's just -4 times 14

Answer 11

-56 @geerky42 thanks

Answer 12

No problem

Answer 13

no thats wrong..it was minus 5x so it would have been 34...thx anyways

Answer 14

@geerky42

Answer 15

i mean 24

Answer 16

oh my bad. I misread it as plus. but still you get the idea what to do in similar problems, right?.

Answer 17

yeah