(4x - 7y)(4x + 7y)
No
4X^2 - 8X factor out 4X 4X(X - 2)
4*x*x*6*x
x^2 + 4x + 5 cannot be factored because its discriminant is less than zero.
(4x - 7y)(4x + 7y)
4(x^2 + x + 3)
(4x + 5)(x - 3)
No
x2 - 4x - 21 = (x-7)(x+3)
4(x - 1)(x + 1)
4X^2 - 8X factor out 4X 4X(X - 2)
4*x*x*6*x
2(x - 1)(2x + y)
4(x+y)^2
x2 + 4x + 3 =(x + 3) (x + 1)
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