Question

if the equation x2-bx+1=0 has two same roots
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Answer 1

Answer:

a = 1

b = b

c = 1

For real roots :-

${b}^{2} - 4ac \: = 0 \\ \\ {b}^{2} - 4(1)(1) = 0 \\ \\ {b}^{2} - 4 = 0 \\ \\ {b}^{2} = 4 \\ \\ b = \sqrt{2} \\ \\ b = ±2$

Hope it helps.