Factorise fully the following:
a) x² - 2x
b) 6x^2+ 12x
c) 3x^3- 9x
d) 4x^2+ 28x^3

c is the answer if I am right I hope

a) x(x - 2)

b) 6x(x + 2)

c) 3x(x^2-3)

d)  (2x)(2x)(1+7x)

Step-by-step explanation:

options a,b,c are the right answer.

step-by-step explanation:

a linear parent function is always represented as y = x

if we write this function in the form of y=mx+c

⇒

or  

now if we plot a graph we will find these characteristics:

1) y intercept of the graph is zero so its a straight line passing through origin.

2) as we can see in both the forms of function written, values of x and y may be either positive or negative for the positive slope means points on the graph are either in first quadrant or in third one.

3) it's slope is one.