(0.2-3a)(0.7-8a)=

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Solution for (0.2-3a)(0.7-8a)= equation:


Simplifying
(0.2 + -3a)(0.7 + -8a) = 0

Multiply (0.2 + -3a) * (0.7 + -8a)
(0.2(0.7 + -8a) + -3a * (0.7 + -8a)) = 0
((0.7 * 0.2 + -8a * 0.2) + -3a * (0.7 + -8a)) = 0
((0.14 + -1.6a) + -3a * (0.7 + -8a)) = 0
(0.14 + -1.6a + (0.7 * -3a + -8a * -3a)) = 0
(0.14 + -1.6a + (-2.1a + 24a2)) = 0

Combine like terms: -1.6a + -2.1a = -3.7a
(0.14 + -3.7a + 24a2) = 0

Solving
0.14 + -3.7a + 24a2 = 0

Solving for variable 'a'.

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

Divide each side by '24'.
0.005833333333 + -0.1541666667a + a2 = 0

Move the constant term to the right:

Add '-0.005833333333' to each side of the equation.
0.005833333333 + -0.1541666667a + -0.005833333333 + a2 = 0 + -0.005833333333

Reorder the terms:
0.005833333333 + -0.005833333333 + -0.1541666667a + a2 = 0 + -0.005833333333

Combine like terms: 0.005833333333 + -0.005833333333 = 0.000000000000
0.000000000000 + -0.1541666667a + a2 = 0 + -0.005833333333
-0.1541666667a + a2 = 0 + -0.005833333333

Combine like terms: 0 + -0.005833333333 = -0.005833333333
-0.1541666667a + a2 = -0.005833333333

The a term is -0.1541666667a.  Take half its coefficient (-0.07708333335).
Square it (0.005941840280) and add it to both sides.

Add '0.005941840280' to each side of the equation.
-0.1541666667a + 0.005941840280 + a2 = -0.005833333333 + 0.005941840280

Reorder the terms:
0.005941840280 + -0.1541666667a + a2 = -0.005833333333 + 0.005941840280

Combine like terms: -0.005833333333 + 0.005941840280 = 0.000108506947
0.005941840280 + -0.1541666667a + a2 = 0.000108506947

Factor a perfect square on the left side:
(a + -0.07708333335)(a + -0.07708333335) = 0.000108506947

Calculate the square root of the right side: 0.010416667

Break this problem into two subproblems by setting 
(a + -0.07708333335) equal to 0.010416667 and -0.010416667.

Subproblem 1

a + -0.07708333335 = 0.010416667 Simplifying a + -0.07708333335 = 0.010416667 Reorder the terms: -0.07708333335 + a = 0.010416667 Solving -0.07708333335 + a = 0.010416667 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '0.07708333335' to each side of the equation. -0.07708333335 + 0.07708333335 + a = 0.010416667 + 0.07708333335 Combine like terms: -0.07708333335 + 0.07708333335 = 0.00000000000 0.00000000000 + a = 0.010416667 + 0.07708333335 a = 0.010416667 + 0.07708333335 Combine like terms: 0.010416667 + 0.07708333335 = 0.08750000035 a = 0.08750000035 Simplifying a = 0.08750000035

Subproblem 2

a + -0.07708333335 = -0.010416667 Simplifying a + -0.07708333335 = -0.010416667 Reorder the terms: -0.07708333335 + a = -0.010416667 Solving -0.07708333335 + a = -0.010416667 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '0.07708333335' to each side of the equation. -0.07708333335 + 0.07708333335 + a = -0.010416667 + 0.07708333335 Combine like terms: -0.07708333335 + 0.07708333335 = 0.00000000000 0.00000000000 + a = -0.010416667 + 0.07708333335 a = -0.010416667 + 0.07708333335 Combine like terms: -0.010416667 + 0.07708333335 = 0.06666666635 a = 0.06666666635 Simplifying a = 0.06666666635

Solution

The solution to the problem is based on the solutions from the subproblems. a = {0.08750000035, 0.06666666635}

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