7z^4-84z^3+189z^2=0

Simple and best practice solution for 7z^4-84z^3+189z^2=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 7z^4-84z^3+189z^2=0 equation:


Simplifying
7z4 + -84z3 + 189z2 = 0

Reorder the terms:
189z2 + -84z3 + 7z4 = 0

Solving
189z2 + -84z3 + 7z4 = 0

Solving for variable 'z'.

Factor out the Greatest Common Factor (GCF), '7z2'.
7z2(27 + -12z + z2) = 0

Factor a trinomial.
7z2((3 + -1z)(9 + -1z)) = 0

Ignore the factor 7.

Subproblem 1

Set the factor 'z2' equal to zero and attempt to solve: Simplifying z2 = 0 Solving z2 = 0 Move all terms containing z to the left, all other terms to the right. Simplifying z2 = 0 Take the square root of each side: z = {0}

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

Subproblem 3

Set the factor '(9 + -1z)' equal to zero and attempt to solve: Simplifying 9 + -1z = 0 Solving 9 + -1z = 0 Move all terms containing z to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -1z = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -1z = 0 + -9 -1z = 0 + -9 Combine like terms: 0 + -9 = -9 -1z = -9 Divide each side by '-1'. z = 9 Simplifying z = 9

Solution

z = {0, 3, 9}

See similar equations:

| 10x-6y+5x= | | y+2x=500 | | -1/8+1/2x=-59/8 | | 0.5x-3=11 | | 7x+x=6x+3+5x | | 96=35+c | | 0.5x-3=11 | | 7-8x=-41 | | 4y-5=13y+31 | | 10x+6y-5x= | | 6n+18=3n+72 | | 10=-3x+5x | | -3/5(x+1)=2 | | 3x-6y-9y+4x+8= | | 5/6x+2=-8 | | q+2.7=0.9 | | (9y-5)=(5-y) | | -5(t-5)+9t=6t-5 | | 10y+14x=170 | | 4/5(x-2)=-8 | | -5/6x+1=-19/6 | | 2x+6=-9x-7 | | 3/4(x+7)=6 | | -9=-6a-3a | | x(2-1)-23=-2 | | 5/2x3/5+4/3x2/5 | | 3.75(q-5)=4(q+3) | | 2/3(x+3)=4 | | 55000+2500y=62000+2000y | | 25x+300=-50x+900 | | 7x+6/7=67/21 | | (-x+1)/3=-4 |

Equations solver categories