If a and b are the roots of the equation x2-2x-7=0, then a-b is

2 thoughts on “If a and b are the roots of the equation x2-2x-7=0, then a-b is”

1. Answer:

   x2+2x+2=0

   Here, a=1,b=2,,c=2

   From quadratic formula,

   x=2×1−2±22−4×2×1

   ⇒x=2−2±2i=−1±i

   Therefore,

   α=−1+i⇒α2=(−1+i)2=−2i

   β=−1−i⇒β2=(−1−i)2=2i

   Now,

   α15+β15

   =(α2)7⋅α+(β2)7⋅β

   =(−2i)7(−1+i)+(2i)7(−1−i)

   =(−2)7(−i)(−1+i)+27(−i)(−1−i)

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2. Answer:

   come here rge-vajs-pjz

   Step-by-step explanation:

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