x*x+3x=28

Simple and best practice solution for x*x+3x=28 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*x+3x=28 equation:


Simplifying
x * x + 3x = 28

Multiply x * x
x2 + 3x = 28

Reorder the terms:
3x + x2 = 28

Solving
3x + x2 = 28

Solving for variable 'x'.

Reorder the terms:
-28 + 3x + x2 = 28 + -28

Combine like terms: 28 + -28 = 0
-28 + 3x + x2 = 0

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

Subproblem 1

Set the factor '(-7 + -1x)' equal to zero and attempt to solve: Simplifying -7 + -1x = 0 Solving -7 + -1x = 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 + -1x = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -1x = 0 + 7 -1x = 0 + 7 Combine like terms: 0 + 7 = 7 -1x = 7 Divide each side by '-1'. x = -7 Simplifying x = -7

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 = {-7, 4}

See similar equations:

| 3(2z+2)-8=34 | | 4s^2+4s+5=0 | | -6x-4[4-3]+3=0 | | x(200-x)=3600(x) | | x(200-x)=3600x | | x(200-x)=3600 | | -140+360x^3=0 | | 3600(x)=x(200-x) | | -140+x^3=0 | | 6[x+2]-x=0 | | ln(0.81)/ln2 | | 2y-37=2y-40 | | 7-3x=2x-14 | | 36.3-0.49= | | 2x+6=4(x-6) | | a^5(a+7a)= | | x/7-5=-2 | | 8+3[2x-4]=0 | | x-7=-x-2 | | 2(v+2)=8v+46 | | 18+6x=2x+42 | | pq*p^6*pq^9= | | x(2x+7)=39 | | a^4+b^4+a^2b^2=(a^2+ab+b^2)(a^2-ab+b^2) | | 2y^3*5y^9= | | 72x-2x^3=108 | | C^14*C^15= | | 14x+18y=24554 | | x-8+3=7 | | e^5=3e^7 | | 6y=5y^2-8 | | -7*(1-7p)= |

Equations solver categories