21x^2-26xy-15y^2=

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Solution for 21x^2-26xy-15y^2= equation:


Simplifying
21x2 + -26xy + -15y2 = 0

Reorder the terms:
-26xy + 21x2 + -15y2 = 0

Solving
-26xy + 21x2 + -15y2 = 0

Solving for variable 'x'.

Factor a trinomial.
(3x + -5y)(7x + 3y) = 0

Subproblem 1

Set the factor '(3x + -5y)' equal to zero and attempt to solve: Simplifying 3x + -5y = 0 Solving 3x + -5y = 0 Move all terms containing x to the left, all other terms to the right. Add '5y' to each side of the equation. 3x + -5y + 5y = 0 + 5y Combine like terms: -5y + 5y = 0 3x + 0 = 0 + 5y 3x = 0 + 5y Remove the zero: 3x = 5y Divide each side by '3'. x = 1.666666667y Simplifying x = 1.666666667y

Subproblem 2

Set the factor '(7x + 3y)' equal to zero and attempt to solve: Simplifying 7x + 3y = 0 Solving 7x + 3y = 0 Move all terms containing x to the left, all other terms to the right. Add '-3y' to each side of the equation. 7x + 3y + -3y = 0 + -3y Combine like terms: 3y + -3y = 0 7x + 0 = 0 + -3y 7x = 0 + -3y Remove the zero: 7x = -3y Divide each side by '7'. x = -0.4285714286y Simplifying x = -0.4285714286y

Solution

x = {1.666666667y, -0.4285714286y}

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