Mathematics: Solve the quadratic equation below. x2 + 6x – 15 = -8

Solve the quadratic equation below. x2 + 6x –

bethltaylor

08.01.2022

x²+6x-15=-8

x²+6x-7=0

Δ= b²-4ac = 36+28=64

x₁,₂= $\frac{-6(+/-)\sqrt{64} }{2}$

x1= $\frac{-6+\sqrt{64} }{2}$ = $\frac{-6+8 }{2}$ =

$\frac{2}{2}$ =1

x2= $\frac{-6-sqrt{64} }{2}$ = $\frac{-6-8 }{2}$ =

$\frac{-14}{2}$ =7

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mariagoldgames

23.03.2023

P(x<10) =0

Step-by-step explanation:

M =1/μ

M= 1/15 =0.066667

X- Exp (0.066667)

Where: X is the random variable for number of days

P (X<x) = 1 - e^-mx

P(X - x) = 1 - e^-0.06666 x10

P(x<10) = 0

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