Write the equation of the sphere in standard form. x2 + y2 + z2 + 12x − 4y + 2z + 37 = 0 (x+6)2+(y−2)2+(z+1)2=4 find its center and radius.

The given equation of sphere is

We have to use completing the square method , and in that method, we have to divide 12x ,-4y,2z by 2, square the results, and add the reult obtained after squaring to both sides. That is

So here the center is (-6,2,-1) and radius is 2 .

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.

the first one, all those points on the line just make a strait line.