CarmelCarpentier CarmelCarpentier

16-04-2014
Mathematics

Answered

If x ¤ y = (x + y)² - (x - y)²

Then √5 ¤ √5 =

Verified Answer :

Anonymous Anonymous

16-04-2014

\(x\ \diamond\ y=(x+y)^2-(x-y)^2=x^2+2xy+y^2-(x^2-2xy+y^2)\\\\=x^2+2xy+y^2-x^2+2xy-y^2=4xy\\\\\sqrt5\ \diamond\ \sqrt5=4\cdot\sqrt5\cdot\sqrt5=4\cdot5=20\)

Answer Link

Related Questions

Rob coloured 14 of a rectangle what is another way to name 14

why does it hurt your hands when you carry heavy shopping in carrier bags

What are the similarities and differences between comparing whole numbers and comparing decimals

Hoy can You record decimal notation for decimals and fractions

Mark the statement if it is correct A The First Estate was made up of clergy B The Second Estate was made up of nobles C The Third Estate was made up of journal

who is pietro della vigna

What Element on the periodic table is 5th row 12th column

how to change 2010 to a mixed number

The one the temperature help plzz

the length of a rectangular carpet is 2 times its width the area is 128 square feet What is the length