If x : y = 7 : 3, then the value of xy+y2x2−y2 is
- 3/4
- 5/6
- 3/7
- 6/8
Explanation
=xy=73=xy+y2x2−y2=(xy)+1(x2y2)−1=73+1(73)2−1=103×940=3/4
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