(z-5)(z+4)-70=0

Simple and best practice solution for (z-5)(z+4)-70=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 (z-5)(z+4)-70=0 equation:


Simplifying
(z + -5)(z + 4) + -70 = 0

Reorder the terms:
(-5 + z)(z + 4) + -70 = 0

Reorder the terms:
(-5 + z)(4 + z) + -70 = 0

Multiply (-5 + z) * (4 + z)
(-5(4 + z) + z(4 + z)) + -70 = 0
((4 * -5 + z * -5) + z(4 + z)) + -70 = 0
((-20 + -5z) + z(4 + z)) + -70 = 0
(-20 + -5z + (4 * z + z * z)) + -70 = 0
(-20 + -5z + (4z + z2)) + -70 = 0

Combine like terms: -5z + 4z = -1z
(-20 + -1z + z2) + -70 = 0

Reorder the terms:
-20 + -70 + -1z + z2 = 0

Combine like terms: -20 + -70 = -90
-90 + -1z + z2 = 0

Solving
-90 + -1z + z2 = 0

Solving for variable 'z'.

Factor a trinomial.
(-9 + -1z)(10 + -1z) = 0

Subproblem 1

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

Subproblem 2

Set the factor '(10 + -1z)' equal to zero and attempt to solve: Simplifying 10 + -1z = 0 Solving 10 + -1z = 0 Move all terms containing z to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + -1z = 0 + -10 Combine like terms: 10 + -10 = 0 0 + -1z = 0 + -10 -1z = 0 + -10 Combine like terms: 0 + -10 = -10 -1z = -10 Divide each side by '-1'. z = 10 Simplifying z = 10

Solution

z = {-9, 10}

See similar equations:

| 0=16t^2-4t+3 | | w/-3+15=5 | | M+(-15)=30 | | (4r+6y)-(2y)= | | 27/-3+14=x | | x^2-1/2x+1/8=7/8 | | 2=-2p-(p+1) | | 3.1x=6.7 | | .4x=-14 | | d^2-15d+14=0 | | 500t=150(t+5) | | 3/4b=38 | | 4-(-8)+(-4)= | | -2(6k+2)=-8k-8 | | (2x+18)(x-4)=x(x+9)+60 | | 1.2m+7.5m+2.1=6 | | (36x^4y^8)^1/2 | | 9x^4-15x^3+6x^2/3x^2 | | -(-7z+1)-9=4+z | | 3+9m-1=9m+58-7m | | 0.7x-13=1.4x-20 | | 4x-10x=-12 | | 1/7x=-31 | | -6.5x=19.5 | | -1-7x+5x=19 | | -7(-7z+1)-9=4+z | | 64+27w^3= | | .10y=-2.25 | | M-10=-6 | | 5a^2+23a-10=0 | | -5x=-27 | | (x-4/2)+(x+4/5)=9/2 |

Equations solver categories