Question

Solve the following equations by reducing them quadratic equations:
1. x^4 + 5x^2 – 36 = 0​

Answer 1

Answer:

x=9i,2,-2

Step-by-step explanation:

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

(x^2+9)(x^2-4)=0

(x^2+9)(x+2)(x-2)=0