5X^2+7X=-9

Simple and best practice solution for 5X^2+7X=-9 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 5X^2+7X=-9 equation:


Simplifying
5X2 + 7X = -9

Reorder the terms:
7X + 5X2 = -9

Solving
7X + 5X2 = -9

Solving for variable 'X'.

Reorder the terms:
9 + 7X + 5X2 = -9 + 9

Combine like terms: -9 + 9 = 0
9 + 7X + 5X2 = 0

Begin completing the square.  Divide all terms by
5 the coefficient of the squared term: 

Divide each side by '5'.
1.8 + 1.4X + X2 = 0

Move the constant term to the right:

Add '-1.8' to each side of the equation.
1.8 + 1.4X + -1.8 + X2 = 0 + -1.8

Reorder the terms:
1.8 + -1.8 + 1.4X + X2 = 0 + -1.8

Combine like terms: 1.8 + -1.8 = 0.0
0.0 + 1.4X + X2 = 0 + -1.8
1.4X + X2 = 0 + -1.8

Combine like terms: 0 + -1.8 = -1.8
1.4X + X2 = -1.8

The X term is 1.4X.  Take half its coefficient (0.7).
Square it (0.49) and add it to both sides.

Add '0.49' to each side of the equation.
1.4X + 0.49 + X2 = -1.8 + 0.49

Reorder the terms:
0.49 + 1.4X + X2 = -1.8 + 0.49

Combine like terms: -1.8 + 0.49 = -1.31
0.49 + 1.4X + X2 = -1.31

Factor a perfect square on the left side:
(X + 0.7)(X + 0.7) = -1.31

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| 3x+7-3(-6x-2)=3(x-1) | | x-7=4.46 | | z^2-7z=-12 | | x+3.4=9.6 | | 4x+15=2x-3 | | 6x+7=-53-6x | | .006x^2-.06x+.14=0 | | -2(x-20)=-8 | | 2x+27=34 | | .006x^2-.06x+.12=0 | | 4m+12=4m-3 | | 5x+29-2x=14 | | 5x^4-10x^3+5x^2=0 | | M+3=4m-3 | | -2(5+3a)=56 | | -3x-8=-5x-12 | | 3(5)=5+2y | | 4x+15=2x+65 | | 4x^2-9x+13=3x+8 | | 8x^2-10xy-3y^2=0 | | 12-10x=90-31x | | -34-8x=10x+20 | | 3(-2)=5+2y | | 4x-4=-15x^2 | | 3(-1)=5+2y | | 4s^2-48s+108=0 | | 11x+20=4x+146 | | 45v^2-320=0 | | 3(2)=5+2y | | c^2-14c+48=0 | | 10x-7=5x+27 | | 4-6=5x-14 |

Equations solver categories