What is the volume in m³ of a cubic tank if the edge is x+3 m​

V = x³ + 9x² + 27x + 27

Step-by-step explanation:

The volume (V) of the tank is calculated as

aV = s³ ( s is the side length )

V = (x + 3)³

   = (x + 3)(x + 3)(x + 3) ← expand 2nd/3rd factors using FOIL

   = (x + 3)(x² + 6x + 9) ← distribute

   = x³ + 6x² + 9x + 3x² + 18x + 27 ← collect like terms

   = x³ + 9x² + 27x + 27

y = - 6

step-by-step explanation:

given the point (- 2, y) lies on the graph then it is a solution of it's equation.

substitute x = - 2 into the equation for value of y

y = 3(- 2) = 3 × - 2 = - 6

the point on the graph is (- 2, 6)