Question

Determine the nature of the roots of the following equations from their discriminants-
2x² +5√3+6=0.​

Answer 1

Given equation is, 2x2+53x+16=0

We know, D=b2−4ac

a=1,b=53,c=16

D=(53)2−4×16×2

D=75−128

∴D=−53

Since, D<0. 

The roots arnon real.

Answer 2

Answer:

she bought it on price = 900*8/9 = 800 RS

now her neighbour pay her 9% more on MRP

which is = 900*9/100 = 81

900+81 = 981 RS

so total she gaining = 981 - 800 = 181 RS

on 800 RS she gaining 181 RS

800 RS is the value of = 100 %

1 RS is value of = 100/800%

981 RS is value of = 100/800*981 = 122.62 %

so total she getting is 122.62%

gain = total price - cost price

gain % = getting Amount - 100%

Step-by-step explanation: