Question

which of the following has two equal roots
x square - 2 x minus 1
x square - 2 X + 1
2 x square - 2 X + 1
x square - 2 x minus 3 is equal to zero​

Answer 1

Answer:

x²-2x+1,

Explanation:

Compare x²-2x+1 with

ax²+bx+c , we get

a=1 , b=-2 , c = 1

Discreminant (D) =b²-4ac

= (-2)²-4×1×1

= 4-4

= 0

D=0

Therefore,

x²-2x+1 has two equal roots.

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