Question

Simplify.
a) (3xy3)(2x3y)
b) 2y(2y + 3y2) – y2(3 – y)

Answer 1

For a) separate them into different parts so (3)(2) (x)(x^3) (y^3 )(y)

Answer 2

If you have something like a^n times a^m then a^n+m

Answer 3

like this?.....3*2 =6 and x*x^3 = x^(1+3) = x^4 and y^3 *y = y^(3+1) = y^4

Answer 4

Yes! Now just put them together.

Answer 5

Like this: 6x^4y^4

Answer 6

3*2 = 6x*x^3 = x^(1+3) = x^4 y^3 *y = y^(3+1) = y^4

Answer 7

Put all the parts together. The answer will look like this: 6x^4y^4.

Answer 8

so for the first part do i multiply 3 times 2 and so on?

Answer 9

Yes, you did it fine the first time. You just have to take all 3 parts and put them together. Didn't you get, 6, x^4, and y^4? Just put them all together. 6x^4y^4. That's the answer.

Answer 10

oh i think i get that now :)

Answer 11

now for b, you have to distribute.

Answer 12

ok