Squares and Square Roots in Algebra | square root definition
YoumightliketoreadourIntroductiontoSquaresandSquareRoots[1]first.SquaresTosquareanumber,justmultiplyitbyitself...Example:Whatis3squared?3Squared==3×3=9"Squared"isoftenwrittenasalittle2likethis:Thissays"4Squaredequals16"(thelittle2meansthenumberappearstwiceinmultiplying,so4×4=16)SquareRootAsquarerootgoestheotherdirection:3squaredis9,soasquarerootof9is3Itislikeasking:WhatcanImultiplybyitselftogetthis?DefinitionHereisthedefinition:Asquarerootofxisanumberrwhosesquareisx:r2=xrisasquarerootofxTheS...
You might like to read our Introduction to Squares and Square Roots[1] first.
SquaresTo square a number, just multiply it by itself ...
Example: What is 3 squared? 3 Squared = = 3 × 3 = 9"Squared" is often written as a little 2 like this:
This says "4 Squared equals 16"(the little 2 means the number appears twice in multiplying, so 4×4=16)
Square RootA square root goes the other direction:
3 squared is 9, so a square root of 9 is 3
It is like asking:
What can I multiply by itself to get this?
DefinitionHere is the definition:
A square root of x is a number r whose square is x:
r2 = xr is a square root of x
The Square Root SymbolThis is th...