SOLUTION: the length of a rectangle is 7cm more than the width. the area of the rectangle is 18cm^2. write an equation the represent this? rearrange,factorise and solve the equation to

Algebra ->  Rectangles -> SOLUTION: the length of a rectangle is 7cm more than the width. the area of the rectangle is 18cm^2. write an equation the represent this? rearrange,factorise and solve the equation to      Log On


   

Question 919951: the length of a rectangle is 7cm more than the width. the area of the rectangle is 18cm^2.
write an equation the represent this?
rearrange,factorise and solve the equation to find x
Answer by josgarithmetic(39799) About Me  (Show Source):
You can put this solution on YOUR website!
Dimensions w and L.
L=w+7 and wL=18.

The system representing this:
system%28L=w%2B7%2CwL=18%29

SOLVE
w%28w%2B7%29=18
w%5E2%2B7w-18=0
%28w-2%29%28w%2B9%29=0

The meaningful solution of w is highlight%28w=2%29;
highlight%28L=9%29.