itisSheldon wrote:
What is the value of p − q ?
(1) \(16p^2 = 64 + 16q^2\)
(2) \(p^2 = 36\)
(1)\(16p^2 = 64 + 16q^2................(p-q)(p+q)=4\)
we cannot say anything about p-q
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(2)\(p^2 = 36\)
nothing about q... and p can take values +6 or -6
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combined..
again\(p^2-q^2=4.....36-q^2=4...q^2=32\) ..
p could be 6 or -6 and q could be\(4\sqrt{2}\) or\(-4\sqrt{2}\)
p-q can take more than values
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