z^2-3z=-8

Simple and best practice solution for z^2-3z=-8 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for z^2-3z=-8 equation:


Simplifying
z2 + -3z = -8

Reorder the terms:
-3z + z2 = -8

Solving
-3z + z2 = -8

Solving for variable 'z'.

Reorder the terms:
8 + -3z + z2 = -8 + 8

Combine like terms: -8 + 8 = 0
8 + -3z + z2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-8' to each side of the equation.
8 + -3z + -8 + z2 = 0 + -8

Reorder the terms:
8 + -8 + -3z + z2 = 0 + -8

Combine like terms: 8 + -8 = 0
0 + -3z + z2 = 0 + -8
-3z + z2 = 0 + -8

Combine like terms: 0 + -8 = -8
-3z + z2 = -8

The z term is -3z.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3z + 2.25 + z2 = -8 + 2.25

Reorder the terms:
2.25 + -3z + z2 = -8 + 2.25

Combine like terms: -8 + 2.25 = -5.75
2.25 + -3z + z2 = -5.75

Factor a perfect square on the left side:
(z + -1.5)(z + -1.5) = -5.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| 2(2x-2)=3x-8 | | 5t^2-12t-17=0 | | 3z-14=-34+8z | | Y=30(0.95)t | | (x+.5)(x+.5)= | | 2y-27=-43+6y | | 6-8X= | | 8t-19=-18+7t | | 6x+9=4x+7 | | 7p-4=5+3P | | 7p-4=5+3P | | 7p-4=5+3P | | 2xsq=26 | | 5a+6-9a=25 | | 2xs=26 | | 3(x-4)=6x^2-12x | | 18x-4=9x+2 | | 5x+16=60-2x | | 6x+3y=4t+11 | | (2x^2)-8x-143=0 | | 21=6d+5d | | -63+(-36)= | | f(x)=2x^2-13x+9 | | -36+(-36)= | | 5-3(4z-4)=-5 | | 2(a-7)=5(a-4) | | 8m^2q-2mq+15q=0 | | 2t^2+6t-8=0 | | 0.1(p+17)=1 | | -97=-7x+6(4x-2) | | 7(4x-1)-28= | | 4.2t=-4(0.6t-1.2) |

Equations solver categories