a^2-35a+280=0

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Solution for a^2-35a+280=0 equation:


Simplifying
a2 + -35a + 280 = 0

Reorder the terms:
280 + -35a + a2 = 0

Solving
280 + -35a + a2 = 0

Solving for variable 'a'.

Begin completing the square.

Move the constant term to the right:

Add '-280' to each side of the equation.
280 + -35a + -280 + a2 = 0 + -280

Reorder the terms:
280 + -280 + -35a + a2 = 0 + -280

Combine like terms: 280 + -280 = 0
0 + -35a + a2 = 0 + -280
-35a + a2 = 0 + -280

Combine like terms: 0 + -280 = -280
-35a + a2 = -280

The a term is -35a.  Take half its coefficient (-17.5).
Square it (306.25) and add it to both sides.

Add '306.25' to each side of the equation.
-35a + 306.25 + a2 = -280 + 306.25

Reorder the terms:
306.25 + -35a + a2 = -280 + 306.25

Combine like terms: -280 + 306.25 = 26.25
306.25 + -35a + a2 = 26.25

Factor a perfect square on the left side:
(a + -17.5)(a + -17.5) = 26.25

Calculate the square root of the right side: 5.123475383

Break this problem into two subproblems by setting 
(a + -17.5) equal to 5.123475383 and -5.123475383.

Subproblem 1

a + -17.5 = 5.123475383 Simplifying a + -17.5 = 5.123475383 Reorder the terms: -17.5 + a = 5.123475383 Solving -17.5 + a = 5.123475383 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '17.5' to each side of the equation. -17.5 + 17.5 + a = 5.123475383 + 17.5 Combine like terms: -17.5 + 17.5 = 0.0 0.0 + a = 5.123475383 + 17.5 a = 5.123475383 + 17.5 Combine like terms: 5.123475383 + 17.5 = 22.623475383 a = 22.623475383 Simplifying a = 22.623475383

Subproblem 2

a + -17.5 = -5.123475383 Simplifying a + -17.5 = -5.123475383 Reorder the terms: -17.5 + a = -5.123475383 Solving -17.5 + a = -5.123475383 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '17.5' to each side of the equation. -17.5 + 17.5 + a = -5.123475383 + 17.5 Combine like terms: -17.5 + 17.5 = 0.0 0.0 + a = -5.123475383 + 17.5 a = -5.123475383 + 17.5 Combine like terms: -5.123475383 + 17.5 = 12.376524617 a = 12.376524617 Simplifying a = 12.376524617

Solution

The solution to the problem is based on the solutions from the subproblems. a = {22.623475383, 12.376524617}

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