Factor the expression using the GCF. 15x + 20

5 (3 x + 4)

Step-by-step explanation:

Factor the following:

15 x + 20

Hint: | Factor out the greatest common divisor of the coefficients of 15 x + 20.

Factor 5 out of 15 x + 20:

5 (3 x + 4)

let's call the solutions x₁ = (5 - 2√7)/3 and x₂ = (5 + 2√7)/3

then the equation is (x-x₁)(x-x₂) = 0

if you fill that in you get a lot of numbers which you can recognize as ax²+bx+c=0.

step-by-step explanation:

you can see that a=1 (there is just an x²)

b = (-5 -2√7 + 2√7 - 5)/3 = -10/3

c = -2√7)/3 ) * (-5+2√7)/3) = -1/3

so your answer is 3x^2 – 10x – 1 = 0