jessieCochrane8077 jessieCochrane8077
  • 22-10-2019
  • Mathematics
contestada

Without his pencil or calculator, Joey knows that 2x³+3x²− 1 = 0 has at least one real solution. How does he know?

Respuesta :

hefhamcpep0trxq
hefhamcpep0trxq hefhamcpep0trxq
  • 22-10-2019

Answer: Find the discriminant

Check explanation

Step-by-step explanation:

b^2-4ac

if it is equal to 0 there is no solution

Greater then 0 there is 2 real solution

Less then 0 there is 1 real

3^2-4(2*-1)

9-4(-2)

9(8)

72 there is at least one real solution

Answer Link

Otras preguntas

Sara has six necklaces, but her mother will only allow her to wear two at a time. How many different combinations of two necklaces can Sara wear?
). how adolescents in 27 countries understand, support, and practice human rights
Read the passage. excerpt from “The Pit and the Pendulum” by Edgar Allan Poe In the confusion attending my fall, I did not immediately apprehend a somewhat star
Which shows the repeated multiplication for 9³? 9 • 3 3 • 3 • 3 • 3 • 3 • 3 • 3 • 3 • 3 9 • 9 • 9 • 3 9 • 9 • 9
How do I do place value with whole numbers
How can I get a refund of my money back
light refracts due to a change in ________ a) intensity b) speedc) volumed) energy e)amplitude
Food that will be hot held for service must be reheated to
help me with this plz
what was the governments goal in providing over 1 billion to oklahoma river