Final answer:
The equation representing the area of the garden is w² + 4w - 30 = 0 and the length of the garden is 10 feet.
Step-by-step explanation:
To find the equation representing the area of the garden, we need to first find the length and width of the garden. Let's set up some equations to solve for these values.
Let's say the width of the garden is w feet. According to the given information, the length of the garden is 4 more feet than twice its width. So, the length of the garden would be 2w + 4 feet.
To find the area of the garden, we multiply the length and width. So, the equation representing the area of the garden would be:
Area = Length × Width
Substituting the values we found for the length and width:
Area = (2w + 4) × w
Now, let's solve this equation to find the length of the garden. The area of the garden is given as 30 square feet, so we can set up the equation:
(2w + 4) × w = 30
Simplifying and solving this quadratic equation, we get w² + 4w - 30 = 0.
Using the quadratic formula, we find that w = 3 or w = -10. Since the width cannot be negative, the width of the garden is 3 feet.
Therefore, the length of the garden is 2w + 4 = 2(3) + 4 = 10 feet.