Answers

2014-08-08T15:26:35+08:00
X=no. of rows
2x-10=no. of trees in each row

600=x(2x-10)
600=2x^{2} -10x
\frac{0}{2} = \frac{2x^{2} -10x-600}{2}
0= x^{2}-5x-300
0=(x+15)(x-20)
X=-15, x=20
Disregard x=-15

X=20 <---- no. of rows
2x-10=2(20)-10
           =30 <---- no. of trees in each row
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