Question 231245
lets look at 6
6)
(4x+1)^2
same as
(4x+1)(4x+1)
16x^2+4x+4x+1
combine
16x^2+8x+1
7)
(x-7y)(x+7y)
x^2+7xy-7xy-49y^2
combine
x^2-49y^2
2)
2x(5x^2-6x+7)
10x^3-12x^2+14x
nothing to combine