x^2-(2b-1)x+(b^2-b-20)=0
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Please find below the solution to asked query:
x2 − (2b − 1) x + (b2 − b − 20) = 0
Comparing the above equation with
Ax2 + Bx + C = 0,
We get,
A = 1
B = −(2b − 1)
C = b2 − b − 20
Now, D = B2 − 4AC
= (2b − 1)2 − 4 (b2 − b − 20)
= 4b2 + 1 − 4b − 4b2 + 4b + 80
= 81 > 0So, the above equation has 2 real
and distinct roots given by,
x = −B + D√2A or x = −B − D√2A
⇒ x = 2b − 1 + 92 or x = 2b − 1 − 92
⇒ x = b + 4 or x = b − 5
Hope this would clear your doubt.
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