Factoring a Difference of Two Perfect Squares

1)

x2 − 784 = 0

2)

x2 − 49 = 0

3)

x2 − 400 = 0

1)	x2 − 784 = 0	2)	x2 − 49 = 0	3)	x2 − 400 = 0
	{-28 , 28}		{-7 , 7}		{-20 , 20}