7m^2+8m-3=0

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Solution for 7m^2+8m-3=0 equation:


Simplifying
7m2 + 8m + -3 = 0

Reorder the terms:
-3 + 8m + 7m2 = 0

Solving
-3 + 8m + 7m2 = 0

Solving for variable 'm'.

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

Divide each side by '7'.
-0.4285714286 + 1.142857143m + m2 = 0

Move the constant term to the right:

Add '0.4285714286' to each side of the equation.
-0.4285714286 + 1.142857143m + 0.4285714286 + m2 = 0 + 0.4285714286

Reorder the terms:
-0.4285714286 + 0.4285714286 + 1.142857143m + m2 = 0 + 0.4285714286

Combine like terms: -0.4285714286 + 0.4285714286 = 0.0000000000
0.0000000000 + 1.142857143m + m2 = 0 + 0.4285714286
1.142857143m + m2 = 0 + 0.4285714286

Combine like terms: 0 + 0.4285714286 = 0.4285714286
1.142857143m + m2 = 0.4285714286

The m term is 1.142857143m.  Take half its coefficient (0.5714285715).
Square it (0.3265306123) and add it to both sides.

Add '0.3265306123' to each side of the equation.
1.142857143m + 0.3265306123 + m2 = 0.4285714286 + 0.3265306123

Reorder the terms:
0.3265306123 + 1.142857143m + m2 = 0.4285714286 + 0.3265306123

Combine like terms: 0.4285714286 + 0.3265306123 = 0.7551020409
0.3265306123 + 1.142857143m + m2 = 0.7551020409

Factor a perfect square on the left side:
(m + 0.5714285715)(m + 0.5714285715) = 0.7551020409

Calculate the square root of the right side: 0.868966076

Break this problem into two subproblems by setting 
(m + 0.5714285715) equal to 0.868966076 and -0.868966076.

Subproblem 1

m + 0.5714285715 = 0.868966076 Simplifying m + 0.5714285715 = 0.868966076 Reorder the terms: 0.5714285715 + m = 0.868966076 Solving 0.5714285715 + m = 0.868966076 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-0.5714285715' to each side of the equation. 0.5714285715 + -0.5714285715 + m = 0.868966076 + -0.5714285715 Combine like terms: 0.5714285715 + -0.5714285715 = 0.0000000000 0.0000000000 + m = 0.868966076 + -0.5714285715 m = 0.868966076 + -0.5714285715 Combine like terms: 0.868966076 + -0.5714285715 = 0.2975375045 m = 0.2975375045 Simplifying m = 0.2975375045

Subproblem 2

m + 0.5714285715 = -0.868966076 Simplifying m + 0.5714285715 = -0.868966076 Reorder the terms: 0.5714285715 + m = -0.868966076 Solving 0.5714285715 + m = -0.868966076 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-0.5714285715' to each side of the equation. 0.5714285715 + -0.5714285715 + m = -0.868966076 + -0.5714285715 Combine like terms: 0.5714285715 + -0.5714285715 = 0.0000000000 0.0000000000 + m = -0.868966076 + -0.5714285715 m = -0.868966076 + -0.5714285715 Combine like terms: -0.868966076 + -0.5714285715 = -1.4403946475 m = -1.4403946475 Simplifying m = -1.4403946475

Solution

The solution to the problem is based on the solutions from the subproblems. m = {0.2975375045, -1.4403946475}

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