this week in in learned about polynomials it difficult at first but then I got a hand in it. One of the things I learned was how to solve questions 1.h on page 295.

(4m + 3n)(4m – 3n)

first the 4m multiply and 4m then -3n which is

16m2 – 12mn

then you multiply 3n and 4 m and then multiply 3n and – 3n which is

+12nm- 9n

16m2-12mn+12mn-9n

and because -12mn+12mn are like numbers they cancel each other out and the answer is

16m2-9n2

by Doing the claw it makes it easier to see what you are multiply together.