SOLUTION: Multiply each number by its conjugate. a.) x + √y b.) 2 - √3 c.) √6 + √2 d.) 4 - √5

Algebra ->  Radicals -> SOLUTION: Multiply each number by its conjugate. a.) x + √y b.) 2 - √3 c.) √6 + √2 d.) 4 - √5       Log On


   

Question 673725: Multiply each number by its conjugate.
a.) x + √y
b.) 2 - √3
c.) √6 + √2
d.) 4 - √5
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

F	First terms

O	Outside terms

I	Inside terms

L	Last terms

a.) (x + √y)(x - √y) = x^2 + y   ||Note: x^2 designates x squared

b.) (2 - √3)(2 + √3) = 4 - 3 = 1

c.) (√6 + √2)( √6 - √2) = 6-2 = 4

d.) (4 - √5)(4 + √5) = 16 - 5 = 11