Question

If x⁴ – 5x² + 4 = 0; the values of x are:

विकल्प

• 1 or 2

• ±1 or ±2

• –1 and 2

• –2, –1, 1 or 2

Answer 1

±1 or ±2 and –2, –1, 1 or 2