12x^2+21xy-45y^2=

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Solution for 12x^2+21xy-45y^2= equation:


Simplifying
12x2 + 21xy + -45y2 = 0

Reorder the terms:
21xy + 12x2 + -45y2 = 0

Solving
21xy + 12x2 + -45y2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '3'.
3(7xy + 4x2 + -15y2) = 0

Factor a trinomial.
3((4x + -5y)(x + 3y)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(4x + -5y)' equal to zero and attempt to solve: Simplifying 4x + -5y = 0 Solving 4x + -5y = 0 Move all terms containing x to the left, all other terms to the right. Add '5y' to each side of the equation. 4x + -5y + 5y = 0 + 5y Combine like terms: -5y + 5y = 0 4x + 0 = 0 + 5y 4x = 0 + 5y Remove the zero: 4x = 5y Divide each side by '4'. x = 1.25y Simplifying x = 1.25y

Subproblem 2

Set the factor '(x + 3y)' equal to zero and attempt to solve: Simplifying x + 3y = 0 Solving x + 3y = 0 Move all terms containing x to the left, all other terms to the right. Add '-3y' to each side of the equation. x + 3y + -3y = 0 + -3y Combine like terms: 3y + -3y = 0 x + 0 = 0 + -3y x = 0 + -3y Remove the zero: x = -3y Simplifying x = -3y

Solution

x = {1.25y, -3y}

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