Question

3,9, 10 and 12 question please anyone help

Answer 1

Answer:

3) 5/2,-2/5

Step-by-step explanation:

x-1/x=2.1

or,10x-10/x=21

or,10x²-10=21x

or,10x²-21x-10=0

or,10x²-25x+4x-10=0

or,5x(2x-5)+2(2x-5)=0

or,(5x+2)(2x-5)=0

or,(5x+2)=0 and 2x-5=0

then, x=-2/5 and 5/2