4s+s^2=15

Simple and best practice solution for 4s+s^2=15 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 4s+s^2=15 equation:


Simplifying
4s + s2 = 15

Solving
4s + s2 = 15

Solving for variable 's'.

Reorder the terms:
-15 + 4s + s2 = 15 + -15

Combine like terms: 15 + -15 = 0
-15 + 4s + s2 = 0

Begin completing the square.

Move the constant term to the right:

Add '15' to each side of the equation.
-15 + 4s + 15 + s2 = 0 + 15

Reorder the terms:
-15 + 15 + 4s + s2 = 0 + 15

Combine like terms: -15 + 15 = 0
0 + 4s + s2 = 0 + 15
4s + s2 = 0 + 15

Combine like terms: 0 + 15 = 15
4s + s2 = 15

The s term is 4s.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4s + 4 + s2 = 15 + 4

Reorder the terms:
4 + 4s + s2 = 15 + 4

Combine like terms: 15 + 4 = 19
4 + 4s + s2 = 19

Factor a perfect square on the left side:
(s + 2)(s + 2) = 19

Calculate the square root of the right side: 4.358898944

Break this problem into two subproblems by setting 
(s + 2) equal to 4.358898944 and -4.358898944.

Subproblem 1

s + 2 = 4.358898944 Simplifying s + 2 = 4.358898944 Reorder the terms: 2 + s = 4.358898944 Solving 2 + s = 4.358898944 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + s = 4.358898944 + -2 Combine like terms: 2 + -2 = 0 0 + s = 4.358898944 + -2 s = 4.358898944 + -2 Combine like terms: 4.358898944 + -2 = 2.358898944 s = 2.358898944 Simplifying s = 2.358898944

Subproblem 2

s + 2 = -4.358898944 Simplifying s + 2 = -4.358898944 Reorder the terms: 2 + s = -4.358898944 Solving 2 + s = -4.358898944 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + s = -4.358898944 + -2 Combine like terms: 2 + -2 = 0 0 + s = -4.358898944 + -2 s = -4.358898944 + -2 Combine like terms: -4.358898944 + -2 = -6.358898944 s = -6.358898944 Simplifying s = -6.358898944

Solution

The solution to the problem is based on the solutions from the subproblems. s = {2.358898944, -6.358898944}

See similar equations:

| -2p+10+7p=-5 | | 1/2+x/5=19/10 | | 2x+2x=x+x | | X2/x-3 | | 0.1(0.1x+0.9)=-0.3 | | -6-(-4)=0 | | X+1/10=-1/20 | | -4(2t+3)=2(5-4t)-22 | | X+1/0=-1/20 | | 10+2t=16 | | 2r^2-13r=7 | | 6x-2+x=2x+3 | | -5(2a-3)=2(4-5a)+7 | | x+2/2-5x-12/6=1 | | (y-4)+y^2=16 | | (14-3y)+2y=7 | | 12x+30=3x | | 3+7x=2x+3 | | 7x/16+1/8=3x/8 | | -5x/7-6=-1 | | 2x+10=30-8x | | 2x+10=-3-08x | | 7x+1.5=-10.4 | | -56(x+3)=-21(x+8) | | -27.5-3x=1.3 | | -10+-10=0 | | (x+9)/3=6 | | 3+7x=2x+5 | | 3(3x+2)-1=8 | | y=1/7x-1 | | (1,4/1,5+0,3-0,36)*5+[1,16-0,5]= | | 1/5(5x-9)=4 |

Equations solver categories