Question

Find the roots of 3√7x^2 +4x - √7 = 0

Answer 1

Answer:

Step-by-step explanation:

Answer 2

Step-by-step explanation:

D= b^2 - 4ac

= 4^2 - 4(3 root 7)( - root 7)

= 16 + 84 [ (root 7)(- root 7)= -7]

= 100

root D = root 100

= 10

# x = - b + root D / 2a

= - 4 + 10 / 2( 3 root 7)

= 6 / 2 x 3 root 7

= 1 / root 7

now, rationalise root 7 it becomes

= root 7/ 7 - answer

# x = - b - root D / 2a

= - 4 - 10 / 2(3 root 7)

= -14 / 2( 3 root 7)

= - 7 / 3 root 7