Math, asked by boss74, 1 year ago

x^2-(2b-1)x+(b^2-b-20)=0

Answers

Answered by lm1039it848
1


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.



Similar questions