Question

x^4 +3x^2+4 factorise​

Answer 1

x⁴ + 3x²+4

(x²)² + 3x² + 4

(x²)² -x²+4x²+4

x²(x²-1) + 4(x²+1)

x²[(x+1)(x-1)] + 4(x²+1)

(x²+4)(x+1)(x-2)

Not sure about the answer.