Solve the system of equations by finding the reduced row-echelon form of the augmented matrix for the system of equations.

2x+y + 4z = 16
5x - 2y + 2z = -1
X + 2y - 32 = -9

A. (-1, 2, 22)
b. (-10, 22, 42)
c. (-1, 2, 4)
d (-10, 2, 22)

two data sets with the same median will not have the same varaibility

step-by-step explanation:

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