Question

30 (x^2 + 1/x^2)-77(x-1/x) -12 =0 ​

Answer 1

30(x^2+1/x^2) -77(x-1/x) -12= 0

30x^2 +30/x^2 -77x+77/x -12 = 0

lcm = x^2

(30x^4 + 30-77x^3+77x-12x^2) /x^2 = 0

30x^4 -77x^3-12x^2+77x+30 = 0

we have to find the value of x

then we have to factorise the quantic polynomial

then, if you are 9 class you can understand it