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The first step is to multiply out the bracket

3x³ - 3x² - 36x = 0

Then remove the common factor 3x

3x(x² - x - 12) = 0

Then factorise the brack...

First: (x + 2)(x + 3) = x² + 5x + 6

Second: (x² + 5x + 6)(x + 6) = x³ + 5x² + 6x + 6x² + 30x + 36 = x³ + 11x² + 36x +36<...

Notice that the questions specifies that you should expand and simplify. This means expanding the equations is a good idea. To expand the equation, we will start by expanding each brackets.

3(x-2)-...

To find the answer to this, we can use the point-slope form. To do this: y - (-7) = 3 (x - 4) Simplified: y + 7 = 3x - 12 : y = 3x - 19

30y+15x=120

12y+15x=84

18y=36

y=2

4(2)+5x=28

8+5x=28

5x=20

x=4