10x^2=15-7x

Simple and best practice solution for 10x^2=15-7x 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 10x^2=15-7x equation:


Simplifying
10x2 = 15 + -7x

Solving
10x2 = 15 + -7x

Solving for variable 'x'.

Reorder the terms:
-15 + 7x + 10x2 = 15 + -7x + -15 + 7x

Reorder the terms:
-15 + 7x + 10x2 = 15 + -15 + -7x + 7x

Combine like terms: 15 + -15 = 0
-15 + 7x + 10x2 = 0 + -7x + 7x
-15 + 7x + 10x2 = -7x + 7x

Combine like terms: -7x + 7x = 0
-15 + 7x + 10x2 = 0

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

Divide each side by '10'.
-1.5 + 0.7x + x2 = 0

Move the constant term to the right:

Add '1.5' to each side of the equation.
-1.5 + 0.7x + 1.5 + x2 = 0 + 1.5

Reorder the terms:
-1.5 + 1.5 + 0.7x + x2 = 0 + 1.5

Combine like terms: -1.5 + 1.5 = 0.0
0.0 + 0.7x + x2 = 0 + 1.5
0.7x + x2 = 0 + 1.5

Combine like terms: 0 + 1.5 = 1.5
0.7x + x2 = 1.5

The x term is 0.7x.  Take half its coefficient (0.35).
Square it (0.1225) and add it to both sides.

Add '0.1225' to each side of the equation.
0.7x + 0.1225 + x2 = 1.5 + 0.1225

Reorder the terms:
0.1225 + 0.7x + x2 = 1.5 + 0.1225

Combine like terms: 1.5 + 0.1225 = 1.6225
0.1225 + 0.7x + x2 = 1.6225

Factor a perfect square on the left side:
(x + 0.35)(x + 0.35) = 1.6225

Calculate the square root of the right side: 1.27377392

Break this problem into two subproblems by setting 
(x + 0.35) equal to 1.27377392 and -1.27377392.

Subproblem 1

x + 0.35 = 1.27377392 Simplifying x + 0.35 = 1.27377392 Reorder the terms: 0.35 + x = 1.27377392 Solving 0.35 + x = 1.27377392 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.35' to each side of the equation. 0.35 + -0.35 + x = 1.27377392 + -0.35 Combine like terms: 0.35 + -0.35 = 0.00 0.00 + x = 1.27377392 + -0.35 x = 1.27377392 + -0.35 Combine like terms: 1.27377392 + -0.35 = 0.92377392 x = 0.92377392 Simplifying x = 0.92377392

Subproblem 2

x + 0.35 = -1.27377392 Simplifying x + 0.35 = -1.27377392 Reorder the terms: 0.35 + x = -1.27377392 Solving 0.35 + x = -1.27377392 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.35' to each side of the equation. 0.35 + -0.35 + x = -1.27377392 + -0.35 Combine like terms: 0.35 + -0.35 = 0.00 0.00 + x = -1.27377392 + -0.35 x = -1.27377392 + -0.35 Combine like terms: -1.27377392 + -0.35 = -1.62377392 x = -1.62377392 Simplifying x = -1.62377392

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.92377392, -1.62377392}

See similar equations:

| 1/5=y+2/5 | | (3x+14)/2=4 | | 5x+2=1(x+4) | | x/4=y+2 | | 35*7k/4 | | -5+10=16x-4-15x | | 12x+2=1(x+4) | | 8.6+4.1(x)=x+77.9 | | 4y-1=2+1 | | .05*.05*.05*.05= | | -5(4t-2)+7t=8t-6 | | 8.6+4.1x=x+77.9 | | 12x-2=1(x+4) | | -8=(x+68)/-9 | | 8a-3(a-4)=3 | | 12x-2=1(x-3) | | 2x+7=3x-2 | | (3x+7)/4=-2 | | 9x+7=9(x+1) | | 11x-2=1(x-3) | | 21+3f=9-3f | | (x/6)-2=(x/6) | | (2x+1)(-6x+5)=0 | | 0.002h-4=0.02+4h-8 | | 3x+7/4=-2 | | 2377960+26x=-1825 | | 15x+1=yforc | | 3+(x-3)=x+1 | | 12y=11(y+12) | | 4h-8=3n+2 | | 4x+(3/4)=5x-(3/4) | | 14(9x-9)-7x=-9 |

Equations solver categories