(2a-5)(a+7)=0

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Solution for (2a-5)(a+7)=0 equation:


Simplifying
(2a + -5)(a + 7) = 0

Reorder the terms:
(-5 + 2a)(a + 7) = 0

Reorder the terms:
(-5 + 2a)(7 + a) = 0

Multiply (-5 + 2a) * (7 + a)
(-5(7 + a) + 2a * (7 + a)) = 0
((7 * -5 + a * -5) + 2a * (7 + a)) = 0
((-35 + -5a) + 2a * (7 + a)) = 0
(-35 + -5a + (7 * 2a + a * 2a)) = 0
(-35 + -5a + (14a + 2a2)) = 0

Combine like terms: -5a + 14a = 9a
(-35 + 9a + 2a2) = 0

Solving
-35 + 9a + 2a2 = 0

Solving for variable 'a'.

Factor a trinomial.
(-7 + -1a)(5 + -2a) = 0

Subproblem 1

Set the factor '(-7 + -1a)' equal to zero and attempt to solve: Simplifying -7 + -1a = 0 Solving -7 + -1a = 0 Move all terms containing a to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + -1a = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -1a = 0 + 7 -1a = 0 + 7 Combine like terms: 0 + 7 = 7 -1a = 7 Divide each side by '-1'. a = -7 Simplifying a = -7

Subproblem 2

Set the factor '(5 + -2a)' equal to zero and attempt to solve: Simplifying 5 + -2a = 0 Solving 5 + -2a = 0 Move all terms containing a to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -2a = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -2a = 0 + -5 -2a = 0 + -5 Combine like terms: 0 + -5 = -5 -2a = -5 Divide each side by '-2'. a = 2.5 Simplifying a = 2.5

Solution

a = {-7, 2.5}

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