First Question:
5a¹⁴ - 20a¹²
Factor out 5a¹² from the expression:
5a¹² x (a² - 4)
Using a² - b² = (a -b) x (a + b), factor the expression:
5a¹² x (a - 2) x (a + 2)
Second Question:
Poisonous is something that releases toxins only after being consumed (ie a dangerous berry may be poisonous but only if you eat it).
Venomous is something that releases toxins when it bites or stings you (ie a snake biting you or a bee stinging you would both be venomous).
