Question

1) 40n3 + 15n2 - 5n = 5n
I mark brainalist pls ans​

Answer 1

Answer:

40n³+15n²-5n = 5n

=> 40n³+15n²-10n = 0

=> 5n(8n²+3n-2) = 0

=> 8n²+3n-2 = 0

Comparing with ax²+bx+c = 0 where x and n are same we get,

a=8, b=3, c=-2

Using shridhar acharya formula,

x = -b ± ✓b²-4ac/2a

by using above formula we get 2 answers

Either -3+✓73/16

or, -3-✓73/16

pls mark brainliest.