7a^2-49a=40+2a

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Solution for 7a^2-49a=40+2a equation:


Simplifying
7a2 + -49a = 40 + 2a

Reorder the terms:
-49a + 7a2 = 40 + 2a

Solving
-49a + 7a2 = 40 + 2a

Solving for variable 'a'.

Reorder the terms:
-40 + -49a + -2a + 7a2 = 40 + 2a + -40 + -2a

Combine like terms: -49a + -2a = -51a
-40 + -51a + 7a2 = 40 + 2a + -40 + -2a

Reorder the terms:
-40 + -51a + 7a2 = 40 + -40 + 2a + -2a

Combine like terms: 40 + -40 = 0
-40 + -51a + 7a2 = 0 + 2a + -2a
-40 + -51a + 7a2 = 2a + -2a

Combine like terms: 2a + -2a = 0
-40 + -51a + 7a2 = 0

Factor a trinomial.
(-5 + -7a)(8 + -1a) = 0

Subproblem 1

Set the factor '(-5 + -7a)' equal to zero and attempt to solve: Simplifying -5 + -7a = 0 Solving -5 + -7a = 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 + -7a = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -7a = 0 + 5 -7a = 0 + 5 Combine like terms: 0 + 5 = 5 -7a = 5 Divide each side by '-7'. a = -0.7142857143 Simplifying a = -0.7142857143

Subproblem 2

Set the factor '(8 + -1a)' equal to zero and attempt to solve: Simplifying 8 + -1a = 0 Solving 8 + -1a = 0 Move all terms containing a to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + -1a = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -1a = 0 + -8 -1a = 0 + -8 Combine like terms: 0 + -8 = -8 -1a = -8 Divide each side by '-1'. a = 8 Simplifying a = 8

Solution

a = {-0.7142857143, 8}

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