SOLUTION: A=LW
The area of this rectangle is 21 square units. Find its length(the Horizontal side(x-2)) and With(the Vertical side(x+2)).
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Question 696765: A=LW
The area of this rectangle is 21 square units. Find its length(the Horizontal side(x-2)) and With(the Vertical side(x+2)).
Answer by checkley79(3341) (Show Source): You can put this solution on YOUR website!
A=LW
21=(X-2)(X+2)
21=X^2-4
X^2=21+4
X^2=25
X=SQRT25
X=5 ANS.
L=5-2=3 ANS. FOR THE LENGTH
W=5+2=7 ANS. FOR THE WIDTH.
PROOF:
21=3*7
21=21
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