Question

1- x square / 1+x square =-4/5​

Answer 1

Ans:- = 1 - x^2 / 1 + x^2 = -4/5

= 5(1 - x^2) = -4(1 + x^2)

= 5 - 5x^2 = -4 - 4x^2

= -5x^2 + 4x^2 = -4 - 5

= -x^2 = -9

= x^2 = 9 ( we cancel - by -)

= therefore x = √9 = +_3

hence your answer is 3 and -3