Question
If (x2−y2)=18 and (x−y)=3, find the value of 16x2y2.
Answer: Option D
:
D
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D
(x2−y2)=(x−y)(x+y)=18
(x−y)=3−−−−(i)
(x+y)=183=6−−−−(ii)
Adding equation (i) and (ii) we get
2x=9
x=92
Substituting the value of x in equation (ii) we get
y=32
16x2y2=16×(92)2×(32)2=729
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