-a^2+3a=4

Simple and best practice solution for -a^2+3a=4 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 -a^2+3a=4 equation:


Simplifying
-1a2 + 3a = 4

Reorder the terms:
3a + -1a2 = 4

Solving
3a + -1a2 = 4

Solving for variable 'a'.

Reorder the terms:
-4 + 3a + -1a2 = 4 + -4

Combine like terms: 4 + -4 = 0
-4 + 3a + -1a2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
4 + -3a + a2 = 0

Move the constant term to the right:

Add '-4' to each side of the equation.
4 + -3a + -4 + a2 = 0 + -4

Reorder the terms:
4 + -4 + -3a + a2 = 0 + -4

Combine like terms: 4 + -4 = 0
0 + -3a + a2 = 0 + -4
-3a + a2 = 0 + -4

Combine like terms: 0 + -4 = -4
-3a + a2 = -4

The a term is -3a.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3a + 2.25 + a2 = -4 + 2.25

Reorder the terms:
2.25 + -3a + a2 = -4 + 2.25

Combine like terms: -4 + 2.25 = -1.75
2.25 + -3a + a2 = -1.75

Factor a perfect square on the left side:
(a + -1.5)(a + -1.5) = -1.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| x+4.1=(-2.9) | | 3.4=-13.4+(-3.4c)+1.7c | | -1u+20=11 | | 8*(a*a)+2a-6=0 | | y=-3(-5)-6 | | 44=6+X | | 3x^3+11x^2+9x-5=0 | | X-0.2=0.4 | | y=4(-5)+1 | | 6/8=15/ | | -4a/2 | | 0.7x-2y=53 | | 30=X+5 | | 3(y-10)=x(y-8) | | 2*(x*x)-8x-90=0 | | -4x+5x=-40 | | 1/4*y=12 | | -7x-7y=56 | | -5x-2(-3x-18)=48 | | log(5)(3x+7)=-log(5)(x-5) | | 4x+2x-60=180 | | X*8=120 | | 5*(x*x)-35x+60=0 | | 11+8x=10-3 | | (x*x)=2x+99 | | 6x+2(x-9)+7=5 | | 9d+4d-d-2=5d | | -3x-6=4x+1 | | 3x+6x-1=43 | | H=5+65t-16t^2 | | 3x^2-30x+18=0 | | 30*1/3 |

Equations solver categories