Answer:
BC = 4x-10
Step-by-step explanation:
is the midpoint of AC.
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To find the area multiply the length by the width.
The length and width of a square are the same.
Area = 15 x 15 = 225 square feet.
Answer:

Step-by-step explanation:
Let the number be x;
The product of 4 and the number will be;

The the square of the number is given as;

Taking the difference of both expressions above;

Factor out the common term:

Hence the difference between the product of 4 and a number and the square of the number is 
Answer: The roots are x=-10 +- root 3.
Step-by-step explanation: