t^2+15t-2=0

Simple and best practice solution for t^2+15t-2=0 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 t^2+15t-2=0 equation:


Simplifying
t2 + 15t + -2 = 0

Reorder the terms:
-2 + 15t + t2 = 0

Solving
-2 + 15t + t2 = 0

Solving for variable 't'.

Begin completing the square.

Move the constant term to the right:

Add '2' to each side of the equation.
-2 + 15t + 2 + t2 = 0 + 2

Reorder the terms:
-2 + 2 + 15t + t2 = 0 + 2

Combine like terms: -2 + 2 = 0
0 + 15t + t2 = 0 + 2
15t + t2 = 0 + 2

Combine like terms: 0 + 2 = 2
15t + t2 = 2

The t term is 15t.  Take half its coefficient (7.5).
Square it (56.25) and add it to both sides.

Add '56.25' to each side of the equation.
15t + 56.25 + t2 = 2 + 56.25

Reorder the terms:
56.25 + 15t + t2 = 2 + 56.25

Combine like terms: 2 + 56.25 = 58.25
56.25 + 15t + t2 = 58.25

Factor a perfect square on the left side:
(t + 7.5)(t + 7.5) = 58.25

Calculate the square root of the right side: 7.632168761

Break this problem into two subproblems by setting 
(t + 7.5) equal to 7.632168761 and -7.632168761.

Subproblem 1

t + 7.5 = 7.632168761 Simplifying t + 7.5 = 7.632168761 Reorder the terms: 7.5 + t = 7.632168761 Solving 7.5 + t = 7.632168761 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-7.5' to each side of the equation. 7.5 + -7.5 + t = 7.632168761 + -7.5 Combine like terms: 7.5 + -7.5 = 0.0 0.0 + t = 7.632168761 + -7.5 t = 7.632168761 + -7.5 Combine like terms: 7.632168761 + -7.5 = 0.132168761 t = 0.132168761 Simplifying t = 0.132168761

Subproblem 2

t + 7.5 = -7.632168761 Simplifying t + 7.5 = -7.632168761 Reorder the terms: 7.5 + t = -7.632168761 Solving 7.5 + t = -7.632168761 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-7.5' to each side of the equation. 7.5 + -7.5 + t = -7.632168761 + -7.5 Combine like terms: 7.5 + -7.5 = 0.0 0.0 + t = -7.632168761 + -7.5 t = -7.632168761 + -7.5 Combine like terms: -7.632168761 + -7.5 = -15.132168761 t = -15.132168761 Simplifying t = -15.132168761

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.132168761, -15.132168761}

See similar equations:

| 0.3[4(x-2)+x]=0.3x | | (6*x^(5/3))-66=0 | | 37=10x-x+1 | | -2m(4m+1)5=-13 | | -6x+7=x-49 | | 6n+-5=-13 | | -12(x-12)=-9(3+7x) | | 9.90+0.05m=25.59 | | 4x+6+11x-6=90 | | (25/0.4x)=3.125 | | 3(x+2)=3x-6 | | 8x+3-5x=3-2x+-2 | | x+2x+6=18 | | 4.9x^2-15x-51=0 | | 52*7=7m | | 29-4s=9s | | 6x^(5/3)-66=0 | | 19-(-13)= | | 6/32 | | -20=4(x-2) | | -6=m-8 | | x(3x-8)=(3x+8)(x-4) | | 4t+12-6= | | -12(x-12)=-9(2+7x) | | 3(x+2)=2x-6 | | 9x-(7x+5)=3x-50 | | -30+12y=-9 | | 3x+8=0+4x | | 8(4k-4)=-5k-42 | | 0+(-13)= | | 3(2.50)+3(5.30)g=55.20 | | -7x-14=5x-14 |

Equations solver categories