what are factors of 2x^4-50x^2?
\begin{array}{rcl} \small{ 2\cdot x^4-50\cdot x^2 \\ &=& 2\cdot x^2\cdot (x^2-25)\\ &=& 2\cdot x^2\cdot (x^2-5^2) \\ &=& 2 \cdot x^2 \cdot (x-5)(x+5)\\ &=& 2 \cdot x\cdot x \cdot (x-5)(x+5)\\ 2\cdot x^4-50\cdot x^2 &=& 2 \cdot (x-0)(x+0)(x-5)(x+5)\\ } \end{array}
what are factors of 2x^4-50x^2?
\begin{array}{rcl} \small{ 2\cdot x^4-50\cdot x^2 \\ &=& 2\cdot x^2\cdot (x^2-25)\\ &=& 2\cdot x^2\cdot (x^2-5^2) \\ &=& 2 \cdot x^2 \cdot (x-5)(x+5)\\ &=& 2 \cdot x\cdot x \cdot (x-5)(x+5)\\ 2\cdot x^4-50\cdot x^2 &=& 2 \cdot (x-0)(x+0)(x-5)(x+5)\\ } \end{array}