Math f(x)
posted by anna .
given f(x)= x^2+x and g(x)=2x+1 determine f[g(x)]
i don't even know where to start with this question help is much needed

well, you know
f(x) = x^2+x, so
f(g) = g^2+g
But, g = 2x+1, so
f(g) = (2x+1)^2 + (2x+1) = 4x^2 + 6x + 2
Respond to this Question
Similar Questions

Math
if x is an even number, what is the quotient of the next greater even number divided by the next greater odd number? 
chemistry
For the following: a)give the reaction type; b)complete and balance the reaction; c)using your answer to part b, determine how much of the other reactant is needed, and how much of each product will be formed, for the given starting … 
math  question
help i don't even know were to start with this. Use a Venn diagram to determine whether A ∩ (B U C) 5 (A ∩ B) U C for all sets A, B, and C. 
math  question
help i don't even know were to start with this. Use a Venn diagram to determine whether A ∩ (B U C) 5 (A ∩ B) U C for all sets A, B, and C. 
math help
Consider the following. (Give your answers correct to four decimal places.) (a) Determine the level of confidence given the confidence coefficient z(á/2) for z(á/2) = 1.65. Incorrect: Your answer is incorrect. . (b) Determine the … 
math geometry
Given a circle with an 8" radius, find the area of the smaller segment whose chord is 8" long? 
Maths Question
the slope of a curve y=f(x) is given by dy/dx= (x1)(x2)^2(x3)^3(x4)^4(x5)^5 for what value or values of x does y have a local maximum/miniumum? 
Chemistry
I don't know how to do this question, or even start it. Please Help. 2 kg copper kettle (specific heat capacity 0.385j/gC) has .0500 kg of water at 20C. How much heat is needed to raise the temperature of the kettle and content to … 
Chemistry
Elemental sulfur occurs as octatomic molecules, S8. What mass of fluorine gas is needed for complete reaction with 24.1 g sulfur to form sulfur hexafluoride? 
Calculus
Determine an upper/lower estimate for the area under the curve f(x) = cos x between x = 0 and x = pi/2 . Show how you arrive at this estimate. This is the question that my teacher wanted us to answer and I'm not sure how to even start …