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

Put these in order of size smallest first 0.5 75% 2/3
Which one of the following short stories is an example of an allegory? A. "A Pair of Silk Stockings" B. "The Private History of a Campaign That Failed" C. "P
Which of the following instruments is used to measure air pressure? A. Thermometer B. Barometer C. Hygrometer D. Anemometer
4. According to the wave-mechanical model of the atom, an orbital is a region of the most probable location of
Consider the following scenario: You live near the shoreline and hear a report that an earthquake hit the ocean floor near your location. Your town may experien
Factor the polynomial completely X^3-11x^2-x+11
Do x < 5 and 5 < x represent the same inequality? Explain. It's no right? Because x has to be less than 5?
Which sentence is punctuated correctly? A. "Felicity said that" she is leaving for practice at 4:15. B. Felicity said that she is leaving for practice at
In act III, scene I, of Shakespeare's Hamlet, why does Hamlet speak rudely to Ophelia, telling her "Get thee to a nunnery"? PLEASE HELP!! A) Hamlet is angry wit
1. Briefly identify and explain the causes of World War I.