alleryStart learning →If 4x^2 - 9y^2 = 60 and 2x + 3y = 10, find 2x - 3y.
A4
B6
C5
D8
Answer & Solution
Correct answer: B. 6
4x^2 - 9y^2 = (2x+3y)(2x-3y), so 2x - 3y = 60/10 = 6.
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