Question

The total number of plants in a garden is modeled by f(x)=2x2−12x, where x represents the number of rows in the garden.

How many rows are in the garden if it has a total of 110 plants?

Answer 1

Let's see

• f(x)=110
• 2x²-12x=110
• 2x²-12x-110=0
• 2(x+5)(x-11)=0
• x=-5 or 11

Take it positive

• rows=x=11

Answer 2

6 rows are in the garden if it has a total of 110 plants