I know theres a very simple formula for factoring cubes and 4th powered equations when theres no middle terms.

for example, for a^2 - b, the formula is (a + root(b))*(a - root(b))

so x^2 - 16 would be (x+4)(x-4)

how can you do cubic/4th powered ones?

ie x^4 - 16?

also, anyone have any resources that teach difference of squares?

(need it to be able to solve

lim (root(x) - x^2) / (1 - root(x) )

x=>1

for example, for a^2 - b, the formula is (a + root(b))*(a - root(b))

so x^2 - 16 would be (x+4)(x-4)

how can you do cubic/4th powered ones?

ie x^4 - 16?

also, anyone have any resources that teach difference of squares?

(need it to be able to solve

lim (root(x) - x^2) / (1 - root(x) )

x=>1

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