f(x)=(x-4)(x+5)

Simple and best practice solution for f(x)=(x-4)(x+5) 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 f(x)=(x-4)(x+5) equation:


Simplifying
f(x) = (x + -4)(x + 5)

Multiply f * x
fx = (x + -4)(x + 5)

Reorder the terms:
fx = (-4 + x)(x + 5)

Reorder the terms:
fx = (-4 + x)(5 + x)

Multiply (-4 + x) * (5 + x)
fx = (-4(5 + x) + x(5 + x))
fx = ((5 * -4 + x * -4) + x(5 + x))
fx = ((-20 + -4x) + x(5 + x))
fx = (-20 + -4x + (5 * x + x * x))
fx = (-20 + -4x + (5x + x2))

Combine like terms: -4x + 5x = 1x
fx = (-20 + 1x + x2)

Solving
fx = -20 + 1x + x2

Solving for variable 'f'.

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

Divide each side by 'x'.
f = -20x-1 + 1 + x

Simplifying
f = -20x-1 + 1 + x

Reorder the terms:
f = 1 + -20x-1 + x

See similar equations:

| 2x+10=3y-2 | | 8n-6n+5=11 | | z/15−14=22 | | D=1.25hv | | 2x-(x/3)=10 | | x^2-2lnx+3=0 | | 39.35=8g+3.51 | | 4n-12=93 | | 7+4(6-5x)=17-13x | | 4n-9=107 | | y-5.5y-0.7=-2-13.2 | | 4x=90-6x | | 23x=3742 | | 98r=197 | | 4(x+3)+8(6x-5)=32-5 | | 1/2y=3x-5 | | 3t-3=111 | | 4t=13 | | tg(x)=0.261 | | 4z=38 | | 7z-5=-145 | | 4n+19=7 | | -2y=6x-10 | | 28-5x=-22 | | X÷4/9=3/8 | | 4(2x+4)=5(4x+1) | | 2x+9x=22 | | tan(x-30)=2 | | -9(x-1)=81 | | 4(v+1)=6v-22 | | 10x^2-5x+8=0 | | 2x-4y-220=0 |

Equations solver categories