alleryStart learning →The lines x + y = 0 and x - y = 0 have which combined equation?
Ax² - y² = 0
Bxy = 0
Cx² + y² = 0
Dx² + xy = 0
Answer & Solution
Correct answer: A. x² - y² = 0
The product (x + y)(x - y) expands to x² - y², set equal to zero.
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