Question
What is a perfect square?
What is a square root?
What is a square root?
Answers
Anonymous
A perfect square is a quadratic expression that factors into two identical binomials.
For example, if you multiply these binomials:
(x + 2)(x + 2)
You get:
x2 + 4x + 4
Therefore, the quadratic expression x2 + 4x + 4 is a perfect square since it factors into two identical binomials which are (x + 2) and (x + 2).
Notice that (x + 2)(x + 2) can be written (x + 2)2. So:
x2 + 4x + 4 = (x + 2)2
Here are some more examples of perfect squares:
x2 + 10x + 25 = (x + 5)(x + 5) = (x + 5)2
x2 - 6x + 9 = (x - 3)(x - 3) = (x - 3)2
What is a square root?
a square root of a number x is a number r such that r2 = x, or in words, a number r whose square (the result of multiplying the number by itself) is x
For example, if you multiply these binomials:
(x + 2)(x + 2)
You get:
x2 + 4x + 4
Therefore, the quadratic expression x2 + 4x + 4 is a perfect square since it factors into two identical binomials which are (x + 2) and (x + 2).
Notice that (x + 2)(x + 2) can be written (x + 2)2. So:
x2 + 4x + 4 = (x + 2)2
Here are some more examples of perfect squares:
x2 + 10x + 25 = (x + 5)(x + 5) = (x + 5)2
x2 - 6x + 9 = (x - 3)(x - 3) = (x - 3)2
What is a square root?
a square root of a number x is a number r such that r2 = x, or in words, a number r whose square (the result of multiplying the number by itself) is x
UFuoQK w0w this is good
UFuoQK w0w this is good
hey, just wanted to comment :)
hey, just wanted to comment :)
While the Komperdell C3 Airs
While the Komperdell C3 Airs
ie: Have I missed any?
ie: Have I missed any?
re comments really that big a deal?
re comments really that big a deal?
thanx big man
thanx big man
is that australian >?>>
is that australian >?>>
Add New Comment
Add New Comment
good one i luv it
good one i luv it
thanx joe
thanx joe
cZkQd6 Good post.
cZkQd6 Good post.
DTWKP4 Add New Comment here
DTWKP4 Add New Comment here
ATOrOa this helped me as hell
ATOrOa this helped me as hell