ymcaflyaway ymcaflyaway
  • 03-06-2020
  • Mathematics
contestada

[3]
(b)
Calculate the values of c for which 2x2 – 3x + c>-2 for all values of x.​

Respuesta :

sqdancefan
sqdancefan sqdancefan
  • 03-06-2020

Answer:

  c > -7/8

Step-by-step explanation:

Add 2 for an inequality that compares to zero:

  2x^2 -3x +(c+2) > 0

This will be true when the discriminant is negative. For the quadratic ...

  ax^2 +bx +c

the discriminant is ...

  b^ -4ac

We want this to be negative:

  (-3)^2 -4(2)(c+2) < 0

  9 -8(c +2) < 0

  9 -8c -16 < 0

  -7 < 8c

  -7/8 < c

The given inequality will be true for all values of c greater than -7/8.

Answer Link

Otras preguntas

Whats closest to 5/6? 0,1/2? Or 1 Please explain why :) thanks
if about 32,834.5 kilobytes of memory is still available how many more pictures can they take
What effect did the formation of the Society of Jesus have on the Roman Catholic Church?
15 liters increased by 60 percent
What is the greatest common factor of 12 and 16?
Your teacher gives you a plant that does NOT have vascular tissue. However, it has a spore-producing capsule that opens by splitting lengthwise. What type of or
What route did christopher Columbus take
Is oxygen a product of cellular respiration?
Who was Pericles? A. a Greek speaker whose fame eventually spread far and wide B. the leader who developed the strategies leading to Greek naval success C. the
How do you put Shays' Rebellion in a sentence?