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Question

Find the roots of quadratic equation x2−5x+4=0.


A

1

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B

4

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C

4

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D

1

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Solution

The correct options are
B

4


D

1


Given equation is x25x+4=0

For the standard form of quadratic equation ax2 + bx + c = 0, roots are b±b24ac2a.

Here, a=1,b= 5,c=4

Roots of the quadratic equation x25x+4=0 are:

x=5±25162 =(5±3)2 =4,1

Thus, the roots of quadratic equation x25x+4=0 are 4 & 1.


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