Function composition

  • Thread starter dance_sg
  • Start date
  • #1
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Homework Statement



(-3x^2-15x-12)(√5)

Homework Equations



Quadratic formula?

The Attempt at a Solution


hmm, i know how to solve the first set of bracets, but what do i do with the radical? how do i multiply it to the polynomial?
 

Answers and Replies

  • #2
42
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all you have to do is multiply it to the two solutions
so say the factored quadratic is (x-4)(x+4), so the solutions are 4 and -4. just multiply the rad5 to those two answers.
 
  • #3
35,287
7,140

Homework Statement



(-3x^2-15x-12)(√5)

Homework Equations



Quadratic formula?

The Attempt at a Solution


hmm, i know how to solve the first set of bracets, but what do i do with the radical? how do i multiply it to the polynomial?

What are you trying to do here? About all you can do with what you've provided is factor the quadratic or multiply the quadratic by sqrt(5). You are not "solving" the first set of brackets - to solve an equation you first off need an equation, which you don't have.
 

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