5a^2-2ab-7b^2=

Solution for 5a^2-2ab-7b^2= equation:

Simplifying
5a2 + -2ab + -7b2 = 0

Reorder the terms:
-2ab + 5a2 + -7b2 = 0

Solving
-2ab + 5a2 + -7b2 = 0

Solving for variable 'a'.

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

Subproblem 1
Set the factor '(5a + -7b)' equal to zero and attempt to solve:

Simplifying
5a + -7b = 0

Solving
5a + -7b = 0

Move all terms containing a to the left, all other terms to the right.

Add '7b' to each side of the equation.
5a + -7b + 7b = 0 + 7b

Combine like terms: -7b + 7b = 0
5a + 0 = 0 + 7b
5a = 0 + 7b
Remove the zero:
5a = 7b

Divide each side by '5'.
a = 1.4b

Simplifying
a = 1.4b
Subproblem 2
Set the factor '(a + b)' equal to zero and attempt to solve:

Simplifying
a + b = 0

Solving
a + b = 0

Move all terms containing a to the left, all other terms to the right.

Add '-1b' to each side of the equation.
a + b + -1b = 0 + -1b

Combine like terms: b + -1b = 0
a + 0 = 0 + -1b
a = 0 + -1b
Remove the zero:
a = -1b

Simplifying
a = -1b
Solution
a = {1.4b, -1b}