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Question

If x and y are the two values of t that satisfy the equation t26t+8=0, with y<x, find the value of xy

A
2
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B
4
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C
6
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D
8
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E
10
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Solution

The correct option is A 2
t26t+8=0
t24t2t+8=0
t(t4)2(t4)=0
(t4)(t2)=0
t4=0 or t2=0
t=4,2
According to the question y<x, so
x=4,y=2
xy=42=2

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