504 views
11 votes
A rectangle has an area of x2 + 7x – 18. Factor

to determine algebraic expressions for the
possible lengths of the sides.

User Digoferra
by
7.5k points

1 Answer

11 votes

Answer:

Step-by-step explanation: Let's see if we can factor

x

2

x

72

. What two numbers sum up to

1

and have a product of

72

?

After some trial and error, we arrive at

9

and

8

. Thus, we now have

(

x

9

)

(

x

+

8

)

Where these can represent the sides of the rectangles.

Hope this helps!

User Unplug
by
7.7k points