Question

. Find x, if f (x) = g (x) where f (x) = x4 + 2x², g(x) = 11x² x = 0, 3, -3 x = 3 , -3 x = 0, 3 x = 0

Answer 1

Answer:

Step-by-step explanation:

f(x) = $x^{4}$ + $2x^{2}$ , g(x) = $11x^{2}$

f(x) = g(x)

x4 + 2x2 = 11x2

∴ x4 – 9x2 = 0

∴ x2 (x2 – 9) = 0

∴ x = 0 or x2 – 9 = 0

∴ x = 0 or x2 = 9

∴ x = 0 or x = ± 3