Answer:

Here are 4 example for u </3

• Mrs. Jacinto asked a carpenter to construct a rectangular bulletin board for her classroom. She told the carpenter that the board’s area must be 18 square feet. Suppose the length of the board is 7 ft. longer than its width.

• Area = l x w
• 18 = x(x+7)
• 18 = x²+7x
• 18 + 49/4 = x²+7x+49/4 this is a quadratic equation.

• The length of a swimming pool is 8m longer than its width and the area is 105m².

Given:

• A=105m²
• l=w+8

Solution:

A= lw

105m²=w(w+8)

0=w²+8w-105

• A square garden will be planted by a border of flowers. The border will be of the same dimensions around the entire garden and the has an area of 81m².

Given:

• A=81m²

Solution:

A= s²

81m²=s²

0=s²-81

• The width of the blackboard is 4 less than its width. The blackboard has an area of 35m².

Given:

• A=35m²
• w=l-4

Solution:

A=lw

35m²=l(l-4)

0=l²-4l-35

Step-by-step explanation:

Hope it helps :)