Question

find binomial expression (2x-y)^4

Answer 1

@satellite73

Answer 2

fourth line of pascals triangle is
1 4 6 4 1

Answer 3

1(2x)^4 + 4(2x)^3(-y) + 6 (2x^2)(-y)^2 + 4(2x)(-y)^3 + (-y)^4 is the first step
second step is computation

Answer 4

stupid typo
1(2x)^4 + 4(2x)^3(-y) + 6 (2x)^2(-y)^2 + 4(2x)(-y)^3 + (-y)^4

Answer 5

i got nothing.:/

would you please explain 1st step a little?

Answer 6

1
1 1
1 2 1
1 3 3 1
1 4 6 4 1

Answer 7

You start with
1
1 1
1 1
1 1

Then you the top two to get the next row:
1
1 1
1 2 1
1 1

since 1 + 1 = 2

1
1 1
1 2 1
1 3 3 1

since 1 + 2 = 3, and 2 + 1 = 3