Math, asked by taransohi538, 8 months ago

answer for x. x2 - (2b-1)x + (b2 - b - 20) = 0​

Answers

Answered by arnavcube123456789
1

Answer:

Step-by-step explanation:

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 = 1B = −(2b − 1)C = b2 − b − 20

Now, D = B2 − 4AC= (2b − 1)2 − 4 (b2 − b − 20)= 4b2 + 1 − 4b − 4b2 + 4b + 80= 81 > 0

So, 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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