Friday

February 27, 2015

February 27, 2015

Posted by **Anonymous** on Wednesday, April 13, 2011 at 12:54am.

- 8th grade math -
**Jai**, Wednesday, April 13, 2011 at 1:19amobserve that we can factor xy from (x^2)y + x(y^2):

(x^2)y + x(y^2) + x + y = 100:

xy [ x + y ] + x + y = 100

then we can factor (x + y):

(x + y)(xy + 1) = 100

since xy = 9,

(x + y)(9 + 1) = 100

(x + y)(10) = 100

x + y = 10

getting its square,

(x + y)^2 = 100

x^2 + 2xy + y^2 = 100

since xy = 9,

x^2 + y^2 + 2*9 = 100

x^2 + y^2 + 18 = 100

x^2 + y^2 = 82

hope this helps~ :)

**Answer this Question**

**Related Questions**

Math- calculus - Suppose f is a function which satisfies the properties: f(x+y)=...

Algebra - What is the smallest integer value of c such that the function f(x)=x...

c++ - Write a program that asks the user to input a grade that he or she ...

8th Grade Math - Please help! Which statement is false? A. The number zero is a ...

Algebra 1 - Which statement about real numbers is true? Across the heading says...

7th grade math Ms.Sue please - 1. Which of these numbers can be classified as ...

math - Translate the following English sentence into a symbolic sentence with ...

trigonometry!!! please help me guys!!! - For a parameter a, suppose u is the ...

math - 1. Which of the following numbers is an example of an integer? a. -15 b. ...

Maths - Find the largest possible value of n, such that there exists n real ...