buchanan911jb16 buchanan911jb16

27-02-2017
Mathematics

Answered

f c(x) = 4x – 2 and d(x) = x2 + 5x, what is (C o D)(x)?

A4x^3 + 18x^2 – 10x
Bx^2 + 9x – 2
C16x^2 + 4x – 6
D4x^2 + 20x – 2

Verified Answer :

jdoe0001 jdoe0001

27-02-2017

\(\bf \begin{cases} c(x)=4x-2\\\\ d(x)=x^2+5x \end{cases}\qquad thus \\\\\\ (c\circ d)(x)\implies \begin{array}{llll} c(x)=&4x-2\\\\ c[\ d(x)\ ]=&4(dx)-2\\\\ c[\ \boxed{x^2+5x}\ ]= &4(\boxed{x^2+5x})-2 \end{array}\)

distribute and simplify

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