Question

If c(x) = 4x – 2 and d(x) = x2 + 5x, what is c(d(x))

Answer 1

hey you again :D

Answer 2

ello same question :=)

Answer 3

so just do the same thing?

Answer 4

yes right

Answer 5

but x is already x so would it be 2x^2 + 5x^2 in the D function?

Answer 6

that would be the same so just replace x in c(x) function by d(x)

Answer 7

\[\huge\rm c(\color{ReD}{d(x)}) = c(\color{Red}{x^2+5x}) =4\color{reD}{x}-2\]

Answer 8

so am i just simplifying x^2+5x=4x-2?

Answer 9

no
you need to
plug x^2+5x into the x
c(x^2+5x) is same as c(d(x))

Answer 10

4x -2
^^^ that x replace by x^2 +5x

Answer 11

ohhh

Answer 12

4x^2 + 3

Answer 13

mhm.. how did you get that ?

Answer 14

4 and x^2 combine then 5-2

Answer 15

remember when multiply same bases we should add their exponents \[\huge\rm x^m \times x^n = x^{m+n}\]
and on't forget the parenthesis

Answer 16

it should be like this \[\huge\rm 4(x^2+5x)-2\]
distribute parentheses by 4 and then combine like terms

Answer 17

ohh i forgot parentheses

Answer 18

4x2+20x−2??

Answer 19

:=) right