Solve 3x^6-3x^2

$$3 x ^ { 6 } - 3 x ^ { 2 }$$

Factor

$$3\left(x-1\right)\left(x+1\right)x^{2}\left(x^{2}+1\right)$$

Solution Steps

Factor out 3.

$$3\left(x^{6}-x^{2}\right)$$

Consider x^{6}-x^{2}. Factor out x^{2}.

$$x^{2}\left(x^{4}-1\right)$$

Consider x^{4}-1. Rewrite x^{4}-1 as \left(x^{2}\right)^{2}-1^{2}. The difference of squares can be factored using the rule: a^{2}-b^{2}=\left(a-b\right)\left(a+b\right).

$$\left(x^{2}-1\right)\left(x^{2}+1\right)$$

Consider x^{2}-1. Rewrite x^{2}-1 as x^{2}-1^{2}. The difference of squares can be factored using the rule: a^{2}-b^{2}=\left(a-b\right)\left(a+b\right).

$$\left(x-1\right)\left(x+1\right)$$

Rewrite the complete factored expression. Polynomial x^{2}+1 is not factored since it does not have any rational roots.

$$3x^{2}\left(x-1\right)\left(x+1\right)\left(x^{2}+1\right)$$

Evaluate

$$3x^{2}\left(x^{4}-1\right)$$