A few days ago
If I do the FOIL rule… Why doesn’t this work?
(-m+4)(m-12)
Why do I get -m^2+16m-48.
Thats not right and I know it. Am I multiplying wrong?
Top 4 Answers
A few days ago
Favorite Answer
It’s right. Maybe the “wrong” part is the signs. Because, based on what I learned from my teacher/s here in my country, the standard form is ax^2+bx+c=0, wherein a=positive integer.
In your answer, the “a” (-m) is negative. So, multiply both sides of the equation by negative 1 (-1).
It becomes:
-1(-m^2+16m-48)= -1(0)
So.. The answer becomes:
m^2-16m+48 = 0.
Okay?
0
A few days ago
Actually, your answer is right.
-m*m= -m^2
-m*-12=12m
4*m=4m
-12*4=-48
which equals to:
-m^2+16m-48
good job solving it right. 😀
0
A few days ago
-m^2+12m+4m-48
-m^2+16m-48
nope, that’s right. maybe the answer key’s just wrong
1
A few days ago
its (-m^2 + – 12m + 4m + 48) which is also -m^2 – 8m + 48 the -12m is negative so -12m + 4 m is -8m…thats what you did wrong.
1
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