Algebrahard · Past Paper
Factorize the expression: x^4 + x^2 + 1
A(x^2+x+1)(x^2-x+1)
B(x^2+1)^2
C(x^2+x-1)(x^2-x-1)
D(x^2+1)(x^2-1)
✓ Correct Answer: A — (x^2+x+1)(x^2-x+1)
Add and subtract x^2: (x^4 + 2x^2 + 1) - x^2 = (x^2+1)^2 - x^2 = (x^2+1+x)(x^2+1-x).
Share this question