Multiply the polynomials:
1. (a + 3)(a - 2)
2. (x2 + 4)(x2 - 4)
3. (x2 + 3x + 1)(x2 + x + 2)
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OpenStudy (anonymous):
use the distributive property
\[a(b\pm c)=ab\pm ac\]
OpenStudy (anonymous):
using this you take the first variable of the first and multiply it by the second parenthesis and same with the second variable/constant of the first
\[a(a-2)+3(a-2)\]
OpenStudy (anonymous):
what do you get when yo udo this?
OpenStudy (anonymous):
So then i got: 2a-2a + 3a-6
OpenStudy (anonymous):
But I dont think that is right lol
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OpenStudy (anonymous):
@Outkast3r09
OpenStudy (anonymous):
everything but your first multiplication is correct
\[a(a)\neq 2a\]
OpenStudy (anonymous):
hint: when you have a number to a power you get this correct
\[2^2=2*2\]
OpenStudy (anonymous):
so \[a*a=?\]
OpenStudy (anonymous):
uhhh 2 squared ???
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OpenStudy (anonymous):
@Outkast3r09
OpenStudy (anonymous):
not quite so 2 is the base
OpenStudy (anonymous):
in \[2^2\]
OpenStudy (anonymous):
the power tells you how many times you multiply that base by itself
OpenStudy (anonymous):
so \[2^3=2*2*2\]
\[2^5=2*2*2*2*2\]
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OpenStudy (anonymous):
so in your case \[
a*a\]
a is your base and the number of bases you multiply is your power
OpenStudy (anonymous):
so \[a*a=a^2\]
OpenStudy (anonymous):
I know how to do powers lol. I just dont know what \[a \times a\] is