2x^2+3x=70

Simple and best practice solution for 2x^2+3x=70 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 2x^2+3x=70 equation:


Simplifying
2x2 + 3x = 70

Reorder the terms:
3x + 2x2 = 70

Solving
3x + 2x2 = 70

Solving for variable 'x'.

Reorder the terms:
-70 + 3x + 2x2 = 70 + -70

Combine like terms: 70 + -70 = 0
-70 + 3x + 2x2 = 0

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

Divide each side by '2'.
-35 + 1.5x + x2 = 0

Move the constant term to the right:

Add '35' to each side of the equation.
-35 + 1.5x + 35 + x2 = 0 + 35

Reorder the terms:
-35 + 35 + 1.5x + x2 = 0 + 35

Combine like terms: -35 + 35 = 0
0 + 1.5x + x2 = 0 + 35
1.5x + x2 = 0 + 35

Combine like terms: 0 + 35 = 35
1.5x + x2 = 35

The x term is 1.5x.  Take half its coefficient (0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
1.5x + 0.5625 + x2 = 35 + 0.5625

Reorder the terms:
0.5625 + 1.5x + x2 = 35 + 0.5625

Combine like terms: 35 + 0.5625 = 35.5625
0.5625 + 1.5x + x2 = 35.5625

Factor a perfect square on the left side:
(x + 0.75)(x + 0.75) = 35.5625

Calculate the square root of the right side: 5.963430221

Break this problem into two subproblems by setting 
(x + 0.75) equal to 5.963430221 and -5.963430221.

Subproblem 1

x + 0.75 = 5.963430221 Simplifying x + 0.75 = 5.963430221 Reorder the terms: 0.75 + x = 5.963430221 Solving 0.75 + x = 5.963430221 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + x = 5.963430221 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + x = 5.963430221 + -0.75 x = 5.963430221 + -0.75 Combine like terms: 5.963430221 + -0.75 = 5.213430221 x = 5.213430221 Simplifying x = 5.213430221

Subproblem 2

x + 0.75 = -5.963430221 Simplifying x + 0.75 = -5.963430221 Reorder the terms: 0.75 + x = -5.963430221 Solving 0.75 + x = -5.963430221 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + x = -5.963430221 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + x = -5.963430221 + -0.75 x = -5.963430221 + -0.75 Combine like terms: -5.963430221 + -0.75 = -6.713430221 x = -6.713430221 Simplifying x = -6.713430221

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.213430221, -6.713430221}

See similar equations:

| 32q-72=0 | | 3b+7a=-5b-62a | | 10+5c-15=-7 | | u^3-4u-24=0 | | 5+x=3x-5 | | N-7=16-2 | | N-7=16-3 | | 64x^2-80x+25y^2= | | 4+5x=-5x+74 | | 13-6=x | | 3.66X+Y=3 | | (-2.2)-(-6.7)=x | | -4(u+2)=-7u-23 | | c=16+0.40(x-90) | | 7x^2+3x+j=0 | | c=12+0.40(x-90) | | C=8+0.40(x-90) | | 100b^2-81= | | 7-3x=x+3 | | 4(3b-1)=5(2b+3) | | -76+12x=5x+29 | | 5.5x=0.1(4x+10) | | 7-7y=5 | | 9+7x-4x=12 | | ln(x-3)+ln(3x+1)=6forx | | -3x+3(5x-5)=-147 | | 3+2x-3x=10 | | 35+15x=17x | | fx-gx=hforx | | 3(x+4)+x=(2x-7) | | -2x+2+3x=6 | | 7p-(p+4)=-2(2p-1)+10 |

Equations solver categories