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Need help please!! Show all work necessary and be detailed also include how you know this and the steps to solve

Need help please!! Show all work necessary and be detailed also include how you know-example-1
User Janty
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1 Answer

6 votes

D: (x+y)²

1) Gathering the data

X > Y

X >0

y>0

2) Since the point here is to find which expression shows the largest number of people, let's call arbitrarily each variable a number considering the constraints given x > y, and both x and y >0

x=100

y=81

A: x²+y² =(100)²+ (81)²=10000 +6561 = 16561

B: x² -y² = (x-y)(x+y) = (100-81)(100+81) = (19)(181) = 3439

C: 2(x+y) = 2 (100+81) = 2 (181)=362

D: (x+y)² = (100+81)² = 32761

3) So the largest expression to calculate these populations, is the square of the sum.

D: (x+y)²

User Patricknelson
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