Asked by Morgan
can someone please check
n^2 + 13n + 42
(n+7) (n+6)
I need help with this one
r^2 - 16r +64
n^2 + 13n + 42
(n+7) (n+6)
I need help with this one
r^2 - 16r +64
Answers
Answered by
Wazurp
The first one is correct
Answered by
Reiny
r^2 - 16r +64
looking at the +64 and the -16, I am looking for two numbers with the same sign
that will multiply to give me 64 and have a sum of -16 ,
the -16 also tells me that both numbers are negative
2 numbers -- sum
-1 -64 -65
-2 -32 -34
-4 -16 -20
-8 -8 -16 <----- got it
(x - 8)(x - 8) or (x - 8)^2
looking at the +64 and the -16, I am looking for two numbers with the same sign
that will multiply to give me 64 and have a sum of -16 ,
the -16 also tells me that both numbers are negative
2 numbers -- sum
-1 -64 -65
-2 -32 -34
-4 -16 -20
-8 -8 -16 <----- got it
(x - 8)(x - 8) or (x - 8)^2
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