Function Composition: Solving Quadratic Formulas with Radicals

[dance_sg]

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?

 

[maladroit]

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.

 

[Mark44]

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.