2z^2+8z-42=0

Simple and best practice solution for 2z^2+8z-42=0 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 2z^2+8z-42=0 equation:


Simplifying
2z2 + 8z + -42 = 0

Reorder the terms:
-42 + 8z + 2z2 = 0

Solving
-42 + 8z + 2z2 = 0

Solving for variable 'z'.

Factor out the Greatest Common Factor (GCF), '2'.
2(-21 + 4z + z2) = 0

Factor a trinomial.
2((-7 + -1z)(3 + -1z)) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-7 + -1z)' equal to zero and attempt to solve: Simplifying -7 + -1z = 0 Solving -7 + -1z = 0 Move all terms containing z to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + -1z = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -1z = 0 + 7 -1z = 0 + 7 Combine like terms: 0 + 7 = 7 -1z = 7 Divide each side by '-1'. z = -7 Simplifying z = -7

Subproblem 2

Set the factor '(3 + -1z)' equal to zero and attempt to solve: Simplifying 3 + -1z = 0 Solving 3 + -1z = 0 Move all terms containing z to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -1z = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1z = 0 + -3 -1z = 0 + -3 Combine like terms: 0 + -3 = -3 -1z = -3 Divide each side by '-1'. z = 3 Simplifying z = 3

Solution

z = {-7, 3}

See similar equations:

| 6x+2.3=-9.7 | | 6n^2-23n=4 | | n(n^2-1)=330 | | 14=8+6 | | ​2​​/3​​=​y−5​​18​​ | | 8-g=-2 | | 10=4+6 | | 3y-(y+2)*(1-2y)=10y-2y*(1-y) | | 1/5x-3=-1 | | (x+1)6-(x-1)6=44x | | 4=10+6 | | -2=-8+6 | | (x+1)3-(x-1)3=32 | | -10=-16+6 | | 4-5*(3-x)=-x-(3-2x) | | 7n^2+29n=-24 | | 5p/5=(-30)/5 | | 4.7k=33.37 | | -4=1/4x-1 | | 12x+35=12x-7 | | 6u-3u-2=1 | | -3.7x=7.75 | | 1/4x-1=-4 | | -7(y-9)=-8y | | x+4=-2(8+2x) | | 2f=1 | | 24(x*x)-8x=0 | | 0=-6x+7x | | 2(3.14)(6.5)+2(3.14)(62)= | | 4y(5y^2)=0 | | 12x=32x+40 | | 20+x=x^2 |

Equations solver categories