class 10 maths question
Answers
x-1/x= 3
[x(square)-1]x= 3
x(square)-1= 3x
x(square)-3x-1= 0
a=1
b=-3
c=-1
Quadratic Formula
D=b(square)-4ac
D= 3^2 - 4(1)(-1)
D= 9 +4
D= 13
[ -b+-(plusminus)(D)] / 2a
use the formula and u will get the answer
Plzzz mark the brainliest
this is how it's done in my school.
Given,x-1/x=3
x^2-1/x=3
x^2-1=3x
x^2-3x-1=0
Let the equation be of form ax^2+bx+c=0 where a=1, b= -3, c=-1
Discriminant,b^2-4ac
=(-3)^2-4(1)(-1)
=9+4=13
X= -b+ √b^2-4ac/2a x=-b-√b^2-4ac/2a
= -3+√13/2 = -3-√13-2
so x=-3+√13/2,-3-√13/2
hope u understand plss mark brainliest