Factoring perfect squares
What is a perfect square?
A perfect square is a number that can be expressed as the product of an integer by itself or as the second exponent of an integer. For example, 25 is a perfect square because it is the product of integer 5 by itself, 5 × 5 = 25.
An example of factoring an equation:
- x²-16 first we divide the x in 2, next what times what equals 16
- (x-4)(x+4)
- now we check
- (x)(x)=x² (-4)(4)=-16
- x²-16