a^2-9a-38=-9

Simple and best practice solution for a^2-9a-38=-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 a^2-9a-38=-9 equation:


Simplifying
a2 + -9a + -38 = -9

Reorder the terms:
-38 + -9a + a2 = -9

Solving
-38 + -9a + a2 = -9

Solving for variable 'a'.

Reorder the terms:
-38 + 9 + -9a + a2 = -9 + 9

Combine like terms: -38 + 9 = -29
-29 + -9a + a2 = -9 + 9

Combine like terms: -9 + 9 = 0
-29 + -9a + a2 = 0

Begin completing the square.

Move the constant term to the right:

Add '29' to each side of the equation.
-29 + -9a + 29 + a2 = 0 + 29

Reorder the terms:
-29 + 29 + -9a + a2 = 0 + 29

Combine like terms: -29 + 29 = 0
0 + -9a + a2 = 0 + 29
-9a + a2 = 0 + 29

Combine like terms: 0 + 29 = 29
-9a + a2 = 29

The a term is -9a.  Take half its coefficient (-4.5).
Square it (20.25) and add it to both sides.

Add '20.25' to each side of the equation.
-9a + 20.25 + a2 = 29 + 20.25

Reorder the terms:
20.25 + -9a + a2 = 29 + 20.25

Combine like terms: 29 + 20.25 = 49.25
20.25 + -9a + a2 = 49.25

Factor a perfect square on the left side:
(a + -4.5)(a + -4.5) = 49.25

Calculate the square root of the right side: 7.017834424

Break this problem into two subproblems by setting 
(a + -4.5) equal to 7.017834424 and -7.017834424.

Subproblem 1

a + -4.5 = 7.017834424 Simplifying a + -4.5 = 7.017834424 Reorder the terms: -4.5 + a = 7.017834424 Solving -4.5 + a = 7.017834424 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + a = 7.017834424 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + a = 7.017834424 + 4.5 a = 7.017834424 + 4.5 Combine like terms: 7.017834424 + 4.5 = 11.517834424 a = 11.517834424 Simplifying a = 11.517834424

Subproblem 2

a + -4.5 = -7.017834424 Simplifying a + -4.5 = -7.017834424 Reorder the terms: -4.5 + a = -7.017834424 Solving -4.5 + a = -7.017834424 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + a = -7.017834424 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + a = -7.017834424 + 4.5 a = -7.017834424 + 4.5 Combine like terms: -7.017834424 + 4.5 = -2.517834424 a = -2.517834424 Simplifying a = -2.517834424

Solution

The solution to the problem is based on the solutions from the subproblems. a = {11.517834424, -2.517834424}

See similar equations:

| x^8-64x^2=0 | | 2111.1/10^6 | | 9r+3(9-7r)= | | 2(x-3)-7=2(x-2) | | 5=5m-23m | | 240=8*x | | a^2-2v=3 | | x^2+12xy+9=0 | | 4(4x+1)=3x-4(6-x)+7 | | a^2+10a+14=-7 | | 0.4485/10^2 | | y=3/7x-1/7 | | x^2+12xy+11=0 | | 4x^2-14=-2 | | x+.60=2.5 | | Ln(X+10)=0 | | 18x=8x^3+9 | | 4(12-8x)=3-2x | | 4y-3x=-18 | | -4x=-14x-5 | | a^2-8k-48=0 | | 0=(x+5)(x-8) | | 2p+1=p-3 | | Cotx=0.3 | | 3c+4.5=7.3-6c | | .4x=3.375*9 | | log[12](x+3)+log[12](x+2)=1 | | a^2+2a-33=0 | | log[13](2x)+log[12](x-1)=1 | | f(x)=2x-3/7 | | Y=3x-7.25 | | 1/2x-10=25 |

Equations solver categories