x^2-bx-4=0

Simple and best practice solution for x^2-bx-4=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 x^2-bx-4=0 equation:


Simplifying
x2 + -1bx + -4 = 0

Reorder the terms:
-4 + -1bx + x2 = 0

Solving
-4 + -1bx + x2 = 0

Solving for variable 'b'.

Move all terms containing b to the left, all other terms to the right.

Add '4' to each side of the equation.
-4 + -1bx + 4 + x2 = 0 + 4

Reorder the terms:
-4 + 4 + -1bx + x2 = 0 + 4

Combine like terms: -4 + 4 = 0
0 + -1bx + x2 = 0 + 4
-1bx + x2 = 0 + 4

Combine like terms: 0 + 4 = 4
-1bx + x2 = 4

Add '-1x2' to each side of the equation.
-1bx + x2 + -1x2 = 4 + -1x2

Combine like terms: x2 + -1x2 = 0
-1bx + 0 = 4 + -1x2
-1bx = 4 + -1x2

Divide each side by '-1x'.
b = -4x-1 + x

Simplifying
b = -4x-1 + x

See similar equations:

| 19+17x=16+18x | | 0.04n-0.05(1n+2)=0.1 | | 3x(4x+5)-(2x+9)= | | 2*x*500=50 | | 4+z=17 | | 12ax^3+20bx^2+32cx= | | -3(-7x+6)=108 | | y=x^2+x+90 | | 30x^4+33x^3-24x^2= | | 7=x/6 | | 10+2y=14 | | -0.08*16= | | (2x^4+7x^3)x+2+3x-5=0 | | 2cos^2x+cosx= | | 7x=12x-40 | | Log[10](9x+4)=2 | | X/5-4=-9 | | t^2-2/t | | 4y+6=7y-4 | | 28n^2+16n-80=0 | | -9+5=14 | | 100x^2-14=0 | | 16+21x=24+17x | | -0.33+1.98-1.44= | | 6m^2+13m+18=0 | | 5+9t+3= | | 8(1-3v)=-8v-40 | | -3x+12=2x+1 | | f-64=315 | | 36000=1200*.06s | | x*0.3=x-105 | | 1/4(7x-16)= |

Equations solver categories