4x^2-28=9x

Simple and best practice solution for 4x^2-28=9x 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 4x^2-28=9x equation:


Simplifying
4x2 + -28 = 9x

Reorder the terms:
-28 + 4x2 = 9x

Solving
-28 + 4x2 = 9x

Solving for variable 'x'.

Reorder the terms:
-28 + -9x + 4x2 = 9x + -9x

Combine like terms: 9x + -9x = 0
-28 + -9x + 4x2 = 0

Factor a trinomial.
(-7 + -4x)(4 + -1x) = 0

Subproblem 1

Set the factor '(-7 + -4x)' equal to zero and attempt to solve: Simplifying -7 + -4x = 0 Solving -7 + -4x = 0 Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + -4x = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -4x = 0 + 7 -4x = 0 + 7 Combine like terms: 0 + 7 = 7 -4x = 7 Divide each side by '-4'. x = -1.75 Simplifying x = -1.75

Subproblem 2

Set the factor '(4 + -1x)' equal to zero and attempt to solve: Simplifying 4 + -1x = 0 Solving 4 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -1x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1x = 0 + -4 -1x = 0 + -4 Combine like terms: 0 + -4 = -4 -1x = -4 Divide each side by '-1'. x = 4 Simplifying x = 4

Solution

x = {-1.75, 4}

See similar equations:

| 3/5x+10=45 | | (7+v)(3v+4)=0 | | x^4+3x^3+9x^2-3x-10=0 | | 4(u-2)(-u+6)=0 | | 2a+5(a+4)=8(-6+4a)-7 | | 1/8x^7-16=0 | | 4(z+5)+6=3(z-5)+6 | | 4(u-2)(-6+6)=0 | | (3v-1)(4-v)=0 | | -7(3n-8)+7(n+4)=6n-6n | | 4x+2y-16=0 | | 4x^5+128=0 | | q-3=7 | | 2p=2 | | 1/4x^8+64=0 | | (5+v)(5v+3)=0 | | 1/6(x+7)+1/2(2x-8)=-4 | | 5u(u-9)(u+8)=0 | | x+2x+(x-9)=87 | | 6x+3x=4x+11 | | 15y-14=2(y+14)-y | | 5(x+4)/6=3x-5 | | x+(x-7)+1/2(x-5)=83 | | 5(3h-2)=29(h+8) | | 5(x+4)=3x-5 | | 5x^2-2y^2=-20 | | 2x^2-13-1=0 | | 3x/4=-3 | | 5x-3(x-5)=-9+5x+18 | | 3x=18x-5 | | (3-2x)/(5+19x) | | -40-10x=10x+10 |

Equations solver categories