AHMEDJAFFRI20
AHMEDJAFFRI20 AHMEDJAFFRI20
  • 23-01-2021
  • Mathematics
contestada

help me with the Quadratic equation.... x2+ (p - 5) x + 2q = 0 has the roots −3 and 6. Find the value of P and the value of q.​

Respuesta :

ChoiSungHyun
ChoiSungHyun ChoiSungHyun
  • 23-01-2021

Step-by-step explanation:

The quadratic equation is x² + (p - 5)x + 2q = 0.

By Vieta's Formula,

we have SOR = -b/a and POR = c/a.

=> (-3) + (6) = -(p - 5) and (-3)(6) = 2q.

=> 3 = 5 - p and -18 = 2q

Hence, p = 2 and q = -9.

Alternate Method:

We have (x + 3) and (x - 6) as factors of the quadratic equation x² + (p - 5)x + 2q = 0.

=> (x + 3)(x - 6) = x² - 3x - 18.

By Comparing Coefficients,

(p - 5) = -3 and 2q = 18.

Hence p = 2 and q = -9.

Answer Link

Otras preguntas

2. Alex needs to contact the architectural firm that created the plans for his home remodel. Where could he look to find this information?
Why are engrams scattered around our brain ?
Help me with the croods #2
how long does it take for 100 hens to lay 100 eggs if 5 hens are known to lay 5 eggs in 5 minutes?​
answer this question pleasebecause I need it tomorrow​
help me on this pls help
A riddle.... A girl has as many brothers as sisters, but each brother has only half as many brothers as sisters. How many brothers and sisters are there in the
Match the steps that marketing management performs to the scenarios that describe the steps
1+√x/1-√x + 1-√x/1+√x
Someone help plz make sure it’s right will make brainiest:)