Posted by **Michelle** on Wednesday, April 29, 2009 at 8:14pm.

I'm doing some word problems on finding the areas of rectangles, its just like all complicated. I don't understand how to do them. For example:

A square field had 3 m added to its length and 2m added to its width. The area is 90 m2(squared). Find the length of a side of the original field.

So first you get (x+3)(x+2)=90, right?

then you get x2+5x+6=90

then x2+5x=84

How do you go on? How do you figure out x? I don't get it! I have other problems like those, could you tell me how to figure out a problem with x2 and something x = a number in general? Please help!

## Answer this Question

## Related Questions

- Brain freezer a.k.a. MATH - Please Help! Are all squares similar? I think that ...
- math hw - the areas of two rectangles are 15 square inches and 16 square inches...
- Math HElP!!!!!!!! - A group of students decided to look at rectangles that are ...
- want to know-math - Substitution can also involve more complicated problems, ...
- math word problem - While finding the amount of seed needed to plant his three ...
- algebra - I have a few math questions I made them just like my actual problems ...
- Math - Estimate the are under the curve f(x)=x^2-4x+5 on [1,3]. Darw the graph ...
- psychology - Gavin, a seventh grader, has more trouble in school than many of ...
- Math. - 39. Students are cleaning a local park in groups. There are 50 boys & 75...
- 5th grade math (word problems) - I didn't see an answer from yesterday, so ...

More Related Questions