x²-y² is same as
a)y²-x²
b)-(y²-x²)
c)x²+y²
d)None of these
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x²-y² is same as
a)y²-x²
b)-(y²-x²)
c)x²+y²
d)None of these
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Answer:
option b is the correct answer bcs when minus sign is outside all sign are changed so it is -(y2-x2)
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