Answer:
x^3+3x^2+9x+27
Step-by-step explanation:

_____
The factoring of the difference of squares is used (twice):
a² -b² = (a -b)(a +b)
Answer:
x=9
Step-by-step explanation:
Answer:
400m
7000000km
25000m
Step-by-step explanation:
Meter to Kilometer is x1000
kilometer to meter is ÷1000
The answer is 28 (I took the quiz in k12) :)
the standard form of a quadratic is simply the equation with all variables and constant on the left-hand-side.
y = 3x² <--- general form
-3x² + y = 0 <--- standard form.