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Friday, November 7, 2014

Solving Quadratic Equations of Two Unknowns, 3

Category: Algebra

"Published in Newark, California, USA"

Solve the following systems by elimination:



Solution:

Consider the given equations above  



Did you notice that 2x² will be eliminated if you will add the two given equations? Add the two equations in order to solve for the value of y.


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If y = 1, then the value of x is









If y = - 1, then the value of x is









Therefore, the solutions of the two equations are: