-5a-2a(4a+5)=7a

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Solution for -5a-2a(4a+5)=7a equation:


Simplifying
-5a + -2a(4a + 5) = 7a

Reorder the terms:
-5a + -2a(5 + 4a) = 7a
-5a + (5 * -2a + 4a * -2a) = 7a
-5a + (-10a + -8a2) = 7a

Combine like terms: -5a + -10a = -15a
-15a + -8a2 = 7a

Solving
-15a + -8a2 = 7a

Solving for variable 'a'.

Reorder the terms:
-15a + -7a + -8a2 = 7a + -7a

Combine like terms: -15a + -7a = -22a
-22a + -8a2 = 7a + -7a

Combine like terms: 7a + -7a = 0
-22a + -8a2 = 0

Factor out the Greatest Common Factor (GCF), '-2a'.
-2a(11 + 4a) = 0

Ignore the factor -2.

Subproblem 1

Set the factor 'a' equal to zero and attempt to solve: Simplifying a = 0 Solving a = 0 Move all terms containing a to the left, all other terms to the right. Simplifying a = 0

Subproblem 2

Set the factor '(11 + 4a)' equal to zero and attempt to solve: Simplifying 11 + 4a = 0 Solving 11 + 4a = 0 Move all terms containing a to the left, all other terms to the right. Add '-11' to each side of the equation. 11 + -11 + 4a = 0 + -11 Combine like terms: 11 + -11 = 0 0 + 4a = 0 + -11 4a = 0 + -11 Combine like terms: 0 + -11 = -11 4a = -11 Divide each side by '4'. a = -2.75 Simplifying a = -2.75

Solution

a = {0, -2.75}

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