- How to factor these: a^2+6a+9-b^2 , b^2+6b+9-a^2 and 4x^3-7x^2-11x+5. (Please answer with steps)?

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Why do you need to use L'Hopital's Rule to find the limit below? limâ”¬( What is the mid line and amplitude of y = 5-4sin t / 5? A cardboard crate is 5 feet long 3 feet wide and 2 feet tall. What is it s holding capacity? If x-1, x+2, and x+4 are factors of a polynomial p(x), which of the following must be equal to 0?
A) p(-2)
B) p(-1)
C) p(2)
D) p(4)? How do I use de Moivre's formula to evaluate (cos pi/7 + i sin pi/7) ^7 in cartesian form?