2006
Mathematics
67ca00ce0c643c71d77dee1f
A binary operation * on the set of rational numbers is defined asx×y=(x^2-y^2)/2xy find-5×3
A.
-8/15
B.
8/15
C.
17/15
D.
-17/15
Correct Answer: -8/15
Explanation
(x)×(y)=(x2-y2)/2xy find-5×3=((x+y)(x-y))/2xy=((-5+3)(-5-3))/(2(-5×3))=(-2×-8)/(2(-5×3))=(-8)/15
(x)×(y)=(x2-y2)/2xy find-5×3=((x+y)(x-y))/2xy=((-5+3)(-5-3))/(2(-5×3))=(-2×-8)/(2(-5×3))=(-8)/15THIS WEEK's
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