Question

I forgot how to do solve for area

Answer 1

The area formula for a triangle is:

(b * h)/2

It could also be written as:

h * (b/2).

So basically,

(x + 3) * ((2x - 6)/2)

And then  you could say:

(x + 3) * (x - 3)

Then just multiply each individual number by eachother.

x * x + x * -3 + 3 * x + 3 * -3

Or,

$x^{2}$ + -3x + 3x - 9

-3x + 3x is equal to 0.

So therefore:

$x^{2}$ - 9 is your final answer.

Answer 2

Base×Height = Area
So put (2x-6)(x+3) which equals
2x^2+6x-6x-18
Combine like terms=
2x^3-18
Simplify by diving each term by 2 since both terms have factors of 2.
Final Answer = x^2-9