Given: A(2,1), B(0,5), C(-1,2), AB and BC, lines x-2y=-5 and -x-3y=-10 through the midpoints of AB and BC and perpendicular to then. Use Gaussian elimination to find the intersection of the lines, the center of the circle containing points A, B, and C. A. (-3,-1)
B. (-3,1)
C. (1,3)

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.