Multiply the following and combine terms where possible

a.) y(x-y+9)=
b.) (-5-x)(5+x)=
c.) (-y^2+3)(y^2-2)=

Question

Multiply the following and combine terms where possible

a.)  y(x-y+9)=
b.)  (-5-x)(5+x)=
c.)  (-y^2+3)(y^2-2)=

jim_thompson5910 · Answer

a.) 

y(x-y+9)


y*x+y*(-y)+y*(9)


xy - y^2 + 9y


So y(x-y+9) simplifies to xy - y^2 + 9y

jim_thompson5910 · Answer

b)

(-5-x)(5+x)


-5(5+x)-x(5+x)


-5*5-5*x-x*5-x*x


-25-5x-5x-x^2


-x^2 - 10x - 25


So (-5-x)(5+x) expands into   -x^2 - 10x - 25

jim_thompson5910 · Answer

c)

Use the same technique used in part b) to expand and simplify.

lgbasallote · Answer

haha got tired @jim_thompson5910 ?

jim_thompson5910 · Answer

lol maybe, but I figured that I'd let her try to solve part c) and see how things go

lgbasallote · Answer

ahh good comeback

anonymous · Answer

This is what I get for C am I right. and fella's there is no need for sarcasm.
-y^4+5y^2-6

jim_thompson5910 · Answer

I wasn't trying to be sarcastic. I apologize if I sounded like it.

jim_thompson5910 · Answer

and you are correct on part c), nice job

anonymous · Answer

thank you

jim_thompson5910 · Answer

you're welcome