Question

mu u sum UI ISL 20 terms of A.P. 3, 7, 11, 15 .... using the formula.
Find the discriminant of the quadratic equation 2x2 + x +4=0, hen
19.
find the nature of its roots.
20.
Find the distance between the points A (8,3 ) and B ( 2, 11 ) by using distance formula ​

Answer 1

Answer: No real root

Step-by-step explanation:

2 x ² + x + 4 = 0

Comparing the equation with  ax² + bx +c = 0

a=2 , b = 1 ,c= 4

We know that

D = b² - 4ac

D = (1)² - 4 ×2 × 4

D = 1 - 32

D = -31

since D < 0

So, the given equation  has no real root.