Mathematics
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OpenStudy (anonymous):
h^2-5h+3 when h=-2
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OpenStudy (solomonzelman):
17
OpenStudy (anonymous):
plug in -2 as the h's.
OpenStudy (shamil98):
\[h^2 - 5h + 3 \]
when h = -2
plug in two
OpenStudy (shamil98):
\[(-2)^2 -5(-2) + 3\]
OpenStudy (shamil98):
\[4 + 10 + 3 = 17\]
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OpenStudy (anonymous):
Gotcha! I need help with one more...
w^-2-5w+3 when w=-2
OpenStudy (solomonzelman):
17
OpenStudy (shamil98):
Try doing it. Just plug in the numbers :P
OpenStudy (anonymous):
I solved it by doing
-4+10+3=9
but my teacher said I was wrong, why?
OpenStudy (solomonzelman):
same but with w
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OpenStudy (shamil98):
Well, you have negative exponent.
OpenStudy (anonymous):
its +4
OpenStudy (solomonzelman):
it is +4
OpenStudy (anonymous):
even exponents make your number + but if it was an odd exponent it would be negative
OpenStudy (anonymous):
How did you guys get 4?
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OpenStudy (shamil98):
w^-2-5w+3 when w=-2
w^-2 = 1/w^2
1/4 -5(-2) + 3
OpenStudy (shamil98):
Guys it is w^-2
which is 1/w^2
OpenStudy (anonymous):
Look at what I said Annetta
OpenStudy (anonymous):
Still confused /:
OpenStudy (anonymous):
Oh for the second one look at what sham said
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OpenStudy (shamil98):
1/4 + 13
= 1/4 + 52/4
= 53/4
OpenStudy (anonymous):
-2*-2=4
-5*-2=10
4-10+3=-3?
OpenStudy (anonymous):
Why am I not getting 4 for the second one?
OpenStudy (anonymous):
lol
OpenStudy (shamil98):
You don't multiply by a negative exponent -_-
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OpenStudy (shamil98):
w^-2 = 1/w^2
OpenStudy (anonymous):
|dw:1381806028466:dw|
OpenStudy (shamil98):
batman, would you care to take over? I would appreciate it..
OpenStudy (anonymous):
Ann, do you understand now?
OpenStudy (anonymous):
Ok, got it