a^2+9a-17=

Simple and best practice solution for a^2+9a-17= 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-17= equation:


Simplifying
a2 + 9a + -17 = 0

Reorder the terms:
-17 + 9a + a2 = 0

Solving
-17 + 9a + a2 = 0

Solving for variable 'a'.

Begin completing the square.

Move the constant term to the right:

Add '17' to each side of the equation.
-17 + 9a + 17 + a2 = 0 + 17

Reorder the terms:
-17 + 17 + 9a + a2 = 0 + 17

Combine like terms: -17 + 17 = 0
0 + 9a + a2 = 0 + 17
9a + a2 = 0 + 17

Combine like terms: 0 + 17 = 17
9a + a2 = 17

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 = 17 + 20.25

Reorder the terms:
20.25 + 9a + a2 = 17 + 20.25

Combine like terms: 17 + 20.25 = 37.25
20.25 + 9a + a2 = 37.25

Factor a perfect square on the left side:
(a + 4.5)(a + 4.5) = 37.25

Calculate the square root of the right side: 6.103277808

Break this problem into two subproblems by setting 
(a + 4.5) equal to 6.103277808 and -6.103277808.

Subproblem 1

a + 4.5 = 6.103277808 Simplifying a + 4.5 = 6.103277808 Reorder the terms: 4.5 + a = 6.103277808 Solving 4.5 + a = 6.103277808 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 = 6.103277808 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + a = 6.103277808 + -4.5 a = 6.103277808 + -4.5 Combine like terms: 6.103277808 + -4.5 = 1.603277808 a = 1.603277808 Simplifying a = 1.603277808

Subproblem 2

a + 4.5 = -6.103277808 Simplifying a + 4.5 = -6.103277808 Reorder the terms: 4.5 + a = -6.103277808 Solving 4.5 + a = -6.103277808 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 = -6.103277808 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + a = -6.103277808 + -4.5 a = -6.103277808 + -4.5 Combine like terms: -6.103277808 + -4.5 = -10.603277808 a = -10.603277808 Simplifying a = -10.603277808

Solution

The solution to the problem is based on the solutions from the subproblems. a = {1.603277808, -10.603277808}

See similar equations:

| 1-10(x+11)=-2(8-x) | | (25-a^2)(2b^2+6b)=0 | | X(x)-18=207 | | a^2+17a-1= | | b=dg | | y=5x^2+15x+3 | | 98-(6a+4)=6(a+7) | | 24x-8=24x-8 | | 2(3n+3)=6(8n+5)+8 | | 3x-2(3x-5)=19 | | 0.02(y-9)+0.16y=0.06y-0.3 | | 2(9+5x)=118 | | 28x-19=3(7x-9)+7x+8 | | =m^2+19m+18 | | -38(x+4)+15=6-4x | | 45+6x-5x=56 | | .4x-2.2=.2 | | 7(5x+8)=12-0(x+4) | | ax-5cx+3ay-15cy= | | 18-6y=24x | | 0.5x+0.15(70)=38.5 | | 8y+4=-20 | | 5xsquare=23x+42 | | 9x-11=42x | | 3y-2y=32 | | 1200+1.10b=2.50 | | 3s+4t=2r-5 | | 4y+8-2y=5+y+1 | | 4x+12x(4x+6)=56 | | -x+y+z=1 | | 325+x=400 | | -5(-6x+8)=-220 |

Equations solver categories