(4x - 7y)(4x + 7y)
(2x-1)(2x-1) = 4x^2 -4x + 1
8x2 + 6x - 9 = 8x2 + 12x - 6x - 9 = 4x(2x + 3) - 3(2x + 3) = (2x + 3)(4x - 3)
Remember both 16 & 25 are squared numbers. 16 = 4^2 & 25 = 5^2 Hence we can write (4x)^2 - (5y)^2 Remember two squared terms with a NEGATIVE Between them will factor. ( 4x - 5y)(4x + 5y) Note the difference signs. NNB Two squared terms with a positive (+) between them DOES NOT factor.
x(x-4)
3x2 + 4x factors to x(3x + 4)
33
4x squared
4x^4 or 4x*4x*4x*4x A formula would be (x^a)(x^b)= x^a+b x^a) / (x^b)= x^a-b
2
-1
(4x - 7y)(4x + 7y)
The GCF is 4x.
It is 1/(4x)2
8x squared
It is: 4x squared
2