4=40+2t-5t^2

Simple and best practice solution for 4=40+2t-5t^2 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 4=40+2t-5t^2 equation:


Simplifying
4 = 40 + 2t + -5t2

Solving
4 = 40 + 2t + -5t2

Solving for variable 't'.

Combine like terms: 4 + -40 = -36
-36 + -2t + 5t2 = 40 + 2t + -5t2 + -40 + -2t + 5t2

Reorder the terms:
-36 + -2t + 5t2 = 40 + -40 + 2t + -2t + -5t2 + 5t2

Combine like terms: 40 + -40 = 0
-36 + -2t + 5t2 = 0 + 2t + -2t + -5t2 + 5t2
-36 + -2t + 5t2 = 2t + -2t + -5t2 + 5t2

Combine like terms: 2t + -2t = 0
-36 + -2t + 5t2 = 0 + -5t2 + 5t2
-36 + -2t + 5t2 = -5t2 + 5t2

Combine like terms: -5t2 + 5t2 = 0
-36 + -2t + 5t2 = 0

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

Divide each side by '5'.
-7.2 + -0.4t + t2 = 0

Move the constant term to the right:

Add '7.2' to each side of the equation.
-7.2 + -0.4t + 7.2 + t2 = 0 + 7.2

Reorder the terms:
-7.2 + 7.2 + -0.4t + t2 = 0 + 7.2

Combine like terms: -7.2 + 7.2 = 0.0
0.0 + -0.4t + t2 = 0 + 7.2
-0.4t + t2 = 0 + 7.2

Combine like terms: 0 + 7.2 = 7.2
-0.4t + t2 = 7.2

The t term is -0.4t.  Take half its coefficient (-0.2).
Square it (0.04) and add it to both sides.

Add '0.04' to each side of the equation.
-0.4t + 0.04 + t2 = 7.2 + 0.04

Reorder the terms:
0.04 + -0.4t + t2 = 7.2 + 0.04

Combine like terms: 7.2 + 0.04 = 7.24
0.04 + -0.4t + t2 = 7.24

Factor a perfect square on the left side:
(t + -0.2)(t + -0.2) = 7.24

Calculate the square root of the right side: 2.690724809

Break this problem into two subproblems by setting 
(t + -0.2) equal to 2.690724809 and -2.690724809.

Subproblem 1

t + -0.2 = 2.690724809 Simplifying t + -0.2 = 2.690724809 Reorder the terms: -0.2 + t = 2.690724809 Solving -0.2 + t = 2.690724809 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.2' to each side of the equation. -0.2 + 0.2 + t = 2.690724809 + 0.2 Combine like terms: -0.2 + 0.2 = 0.0 0.0 + t = 2.690724809 + 0.2 t = 2.690724809 + 0.2 Combine like terms: 2.690724809 + 0.2 = 2.890724809 t = 2.890724809 Simplifying t = 2.890724809

Subproblem 2

t + -0.2 = -2.690724809 Simplifying t + -0.2 = -2.690724809 Reorder the terms: -0.2 + t = -2.690724809 Solving -0.2 + t = -2.690724809 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.2' to each side of the equation. -0.2 + 0.2 + t = -2.690724809 + 0.2 Combine like terms: -0.2 + 0.2 = 0.0 0.0 + t = -2.690724809 + 0.2 t = -2.690724809 + 0.2 Combine like terms: -2.690724809 + 0.2 = -2.490724809 t = -2.490724809 Simplifying t = -2.490724809

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.890724809, -2.490724809}

See similar equations:

| 8x^3-12x^2+24x= | | 5-3x=2x^2 | | 4y+6y=2y+28 | | 4y+6y-2y=36 | | v^3=-18 | | v^3=18 | | 5.5(h-5.5)=18.18 | | 5(3+-2)=-3(7-t) | | 3(3y-1)-2(y-2)=4(y+3) | | -4k+8=12-5k | | 2.8(5-t)=7 | | 9-(3r-1)=12 | | 4(4x-9y)+8(3z+2y)= | | 4n+1=-2n+8 | | (x^4)+6=0 | | 2(-7)-9= | | 11x+15y=6888 | | x+5x=9 | | 2(k-5)=2(5x-8) | | x-5x=90 | | 3-5(-4+7a)= | | 11n+7/9=4 | | 11+7/9=4 | | 9-10= | | 7(y-2)=21 | | 2(x+4)=12+x | | 4x+3(x-45)=1000 | | 55=5(3+x) | | 9-1+4= | | 3+10-19+32= | | 3(x+1)=-2(x+1)-4 | | 2(x+1)=(6-3x) |

Equations solver categories