Question

X^4+5x^2-36=0 solve reducing them to quadratic equation

Answer 1

Answer:

x^4+5x^2-36=0

x^4+9x²-4x²-36=0

x²(x²+9)-4(x²+9)=0

(x²+9)(x²-4)=0

x²=-9 x²=4

x=-3. x=2