25-a^2-10a=

Simple and best practice solution for 25-a^2-10a= 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 25-a^2-10a= equation:


Simplifying
25 + -1a2 + -10a = 0

Reorder the terms:
25 + -10a + -1a2 = 0

Solving
25 + -10a + -1a2 = 0

Solving for variable 'a'.

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

Divide each side by '-1'.
-25 + 10a + a2 = 0

Move the constant term to the right:

Add '25' to each side of the equation.
-25 + 10a + 25 + a2 = 0 + 25

Reorder the terms:
-25 + 25 + 10a + a2 = 0 + 25

Combine like terms: -25 + 25 = 0
0 + 10a + a2 = 0 + 25
10a + a2 = 0 + 25

Combine like terms: 0 + 25 = 25
10a + a2 = 25

The a term is 10a.  Take half its coefficient (5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
10a + 25 + a2 = 25 + 25

Reorder the terms:
25 + 10a + a2 = 25 + 25

Combine like terms: 25 + 25 = 50
25 + 10a + a2 = 50

Factor a perfect square on the left side:
(a + 5)(a + 5) = 50

Calculate the square root of the right side: 7.071067812

Break this problem into two subproblems by setting 
(a + 5) equal to 7.071067812 and -7.071067812.

Subproblem 1

a + 5 = 7.071067812 Simplifying a + 5 = 7.071067812 Reorder the terms: 5 + a = 7.071067812 Solving 5 + a = 7.071067812 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + a = 7.071067812 + -5 Combine like terms: 5 + -5 = 0 0 + a = 7.071067812 + -5 a = 7.071067812 + -5 Combine like terms: 7.071067812 + -5 = 2.071067812 a = 2.071067812 Simplifying a = 2.071067812

Subproblem 2

a + 5 = -7.071067812 Simplifying a + 5 = -7.071067812 Reorder the terms: 5 + a = -7.071067812 Solving 5 + a = -7.071067812 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + a = -7.071067812 + -5 Combine like terms: 5 + -5 = 0 0 + a = -7.071067812 + -5 a = -7.071067812 + -5 Combine like terms: -7.071067812 + -5 = -12.071067812 a = -12.071067812 Simplifying a = -12.071067812

Solution

The solution to the problem is based on the solutions from the subproblems. a = {2.071067812, -12.071067812}

See similar equations:

| 11y+9-5y=15 | | 8x+3-6x=13 | | (X+2)+65=180 | | 64+b^2-16b= | | 5x-1=3x+12 | | 9x^2-10-16=0 | | 6(8x-3)=36 | | 2x+50+2x+32=222 | | 49+14s+s^2= | | 25+10r+r^2= | | 9(2x-6)=81 | | X=log(6)-3 | | -4p-12=20 | | x+sqrt(48)=3 | | 25+w^2-10w= | | 8-3(2x-7)=4x+9 | | 3x^2-12y+18=12 | | -8*4(1+5n)=-6n-14 | | Y=9x*10x | | s*6+42=162 | | F(x)=3sin(3x) | | 5x^2+9y^2-8x-4=0 | | x=2x^4-4x^3 | | 5x/x-2=0 | | 3(x-5)-2=-35 | | 7x-12=6x-16 | | 3x+15-x-4=2x-8+10+3x | | f(x)=x^2+x-20 | | f(x)=2x^4-4x^4 | | x^3=-43 | | 14=4(x-5)-6 | | 10h+16=86 |

Equations solver categories