4a^2+19a-3=

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Solution for 4a^2+19a-3= equation:


Simplifying
4a2 + 19a + -3 = 0

Reorder the terms:
-3 + 19a + 4a2 = 0

Solving
-3 + 19a + 4a2 = 0

Solving for variable 'a'.

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

Divide each side by '4'.
-0.75 + 4.75a + a2 = 0

Move the constant term to the right:

Add '0.75' to each side of the equation.
-0.75 + 4.75a + 0.75 + a2 = 0 + 0.75

Reorder the terms:
-0.75 + 0.75 + 4.75a + a2 = 0 + 0.75

Combine like terms: -0.75 + 0.75 = 0.00
0.00 + 4.75a + a2 = 0 + 0.75
4.75a + a2 = 0 + 0.75

Combine like terms: 0 + 0.75 = 0.75
4.75a + a2 = 0.75

The a term is 4.75a.  Take half its coefficient (2.375).
Square it (5.640625) and add it to both sides.

Add '5.640625' to each side of the equation.
4.75a + 5.640625 + a2 = 0.75 + 5.640625

Reorder the terms:
5.640625 + 4.75a + a2 = 0.75 + 5.640625

Combine like terms: 0.75 + 5.640625 = 6.390625
5.640625 + 4.75a + a2 = 6.390625

Factor a perfect square on the left side:
(a + 2.375)(a + 2.375) = 6.390625

Calculate the square root of the right side: 2.527968552

Break this problem into two subproblems by setting 
(a + 2.375) equal to 2.527968552 and -2.527968552.

Subproblem 1

a + 2.375 = 2.527968552 Simplifying a + 2.375 = 2.527968552 Reorder the terms: 2.375 + a = 2.527968552 Solving 2.375 + a = 2.527968552 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-2.375' to each side of the equation. 2.375 + -2.375 + a = 2.527968552 + -2.375 Combine like terms: 2.375 + -2.375 = 0.000 0.000 + a = 2.527968552 + -2.375 a = 2.527968552 + -2.375 Combine like terms: 2.527968552 + -2.375 = 0.152968552 a = 0.152968552 Simplifying a = 0.152968552

Subproblem 2

a + 2.375 = -2.527968552 Simplifying a + 2.375 = -2.527968552 Reorder the terms: 2.375 + a = -2.527968552 Solving 2.375 + a = -2.527968552 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-2.375' to each side of the equation. 2.375 + -2.375 + a = -2.527968552 + -2.375 Combine like terms: 2.375 + -2.375 = 0.000 0.000 + a = -2.527968552 + -2.375 a = -2.527968552 + -2.375 Combine like terms: -2.527968552 + -2.375 = -4.902968552 a = -4.902968552 Simplifying a = -4.902968552

Solution

The solution to the problem is based on the solutions from the subproblems. a = {0.152968552, -4.902968552}

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