Solve this: Q) x4-2x2-3=0 - Maths - Congruency of Triangles

Question

Solve this:
Q) x 4 - 2 x 2 - 3 = 0

Tamonash Ghosh · Answer

x4 - 2x2 - 3 = 0
x4 - ( 3-1 )x2 - 3 = 0
x4 +x2 - 3x​2 - 3 = 0
x2(x2 +1) - 3(x2 +1 )
(x2-3)(x2+1) = 0
so , x2 = 3 or, x = 3 ^1/2
so ,x2 = -! or, x = -11/2

Solve this: Q). x 4 - 2 x 2 - 3 = 0

Solve this:
Q). $x^{4} - 2 x^{2} - 3 = 0$