Help with checking answers. Medal.
Factor each trinomial. Then match the polynomial (term) on the left with its factored form (definition) on the right.
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OpenStudy (secret-ninja):
OpenStudy (secret-ninja):
I think that \[x^2-9x-20\] is C.
Nnesha (nnesha):
yes right bec if you use headphone method
two number -4 and -5 if we add them we should get -9
but if we multiply we get positive 20 but we need negative so yes
we can solve that by using quadratic formula
OpenStudy (secret-ninja):
Oh thanks ^-^ Can you check this one:
I think that \[x^2 - x - 20\]
is D.
Nnesha (nnesha):
yes right
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Nnesha (nnesha):
two number 4 and -5
multiply both 4 times -5 = -20 right
add or subtract -5+4 = -1 so yes right
OpenStudy (secret-ninja):
\[x^2 + 8x - 20 \] is A?
Nnesha (nnesha):
yes right
again two number
10 times -2 = -20 right
10-2 = 8 yesh right