Simplify and expand (X+3)(x-3)(3x+3)

3x^3 + 3x^2 - 27x - 27

Step-by-step explanation:

Work Shown:

(x+3)(x-3)(3x+3)

(x^2-9)(3x+3) difference of squares rule

y(3x+3) let y = x^2-9

y*3x + y*3 distribute

3x( y ) + 3( y )

3x( x^2 - 9 ) + 3(x^2 - 9) plug in y = x^2-9

3x*x^2 + 3x*(-9) + 3*x^2 + 3*(-9) distribute

3x^3 - 27x + 3x^2 - 27

3x^3 + 3x^2 - 27x - 27

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.

7

step-by-step explanation: