x4 +x2 =x2 (x2+1)
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x^2/x +2=4/x +2 (x^2/x)-(4/x)=0 (x^2-4)/x=0 x^2-4=0 (x+2)(x-2)=0 x=±2
what is equivalent to (x plus 4)2
x^(3) + x^(2) + 4x + 4 Factirise x^(2)(x + 1) + 4(x+1) => (X^(2) + 4)(x + 1) = > (x^(2) + 2^(2))(x + 1) NB ; REmember two squared terms with a positive (+) between then does NOT factor.
4x^2 + 32x + 64 = 4(x^2 + 8x + 16) = 4(x + 4)^2 = 4(x + 4)(x + 4)
equals x+2 PROVIDED x is not -2. If x is -2, the ratio is not defined.