Question

please solve 4th and 5th question ............​

Answer 1

Answer:

4) x²-5x+1=0

x(x-5)+1=0

x(x-5)= -1

so x= -1 and 4

now the value of (x+1/x )= -1 -1/1 =-2...answer is b)

5) 2x+3y=0

so 3y= -2x ....(i)

put eqn i in 4x-3y=0

4x-(-2x)=0,...... 4x+2x=0...6x=0 ...x=0

put x=0 in i

..y'll get 3y=0 ..y=0

now x+y=0+0=0

answer is a)