Question

show that the equation 3x^2 + 2x + 8 =0 is not true for any real value of x​

Answer 1

Answer:

Step-by-step explanation:

Brooklyn's car is stopped at a red light. When the light changes, the car accelerates to 75 miles per hour in 15 seconds.

What is the approximate rate of change in the miles per hour that Brooklyn's car accelerated?

A) 5 miles per hour per second

B) 6 miles per hour per second

C) 15 miles per hour per second

D) 45 miles per hour per second 6576y

Answer 2

Answer:  NICE QUESTION BUT FOR THIS YOU NEED TO KNOW THE CONCEPT OF THE QUADRATIC FORMULA:-

the quadratic formula states that if ax2+bx+c is a quadratic equation, then the value of x or the roots of the eqn will be=

alpha = [-b + root over (b2-4ac)] / 2a

and beta = [-b - root over (b2-4ac)] / 2a

alpha and beta are the two roots or zeros or the two values of x as the degree of the equation is 2

ATQ:-

x (alpha) = [-2 + root over (4 - 96)] / 6

=> -2 /6 + (root over -92)/6

now '-' ve root = y*i ( imaginary number). so, the value of x will be imaginary..

x (beta) = [-2 - root over (4 - 96)] / 6

=> -2 /6 + (root over -92)/6

now '-' ve root =  y*i ( imaginary number). so, the value of x will be imaginary..

y is any number

in number system we have two types of numbers :- real numbers and imaginary numbers.... so the value of x is not real but imaginary

HENCE PROVED!!

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