The length of a garden is 2m more than twice its width and its area is 24m squared.Which of the following equations represents the given situation?

a. x2+x=12 b. x2+2x=12 c. x2+x=24 d. x2+2x=24

ANSWER: a
Explain why option letter b,c and d are not the correct answer.
*Answer is already given; just show your solution and strategy on how you solve the problem.

1

Answers

2015-07-20T20:32:33+08:00
W= x
l = 2x+2
Area = w×l = 24

x (2x+2) = 24
2x^2+2x= 24
divide 2x^2+2x to 2 = 24/2

then you get
x^2+x=12
1 2 1