Answer:
zero
explanation:
an example is
1 2 -3
2 -3 1
-3 1 2
Answer:
1. -17 2. -20 3. -5 4. -1
Answer:
3, 15, 14
Step-by-step explanation:
x + 5x + ( 5x -1) = 32
11x - 1 = 32
11x = 32 + 1
11x = 33
11x/11 = 33/11
x = 3
therefore
the first number is 3
the second is 5 × 3 = 15
the third number is 15 - 1 = 14
You can factor this out by thinking of the factors of 56 that have a sum of -1. 7 and 8 are factors of 56 and to get a sum of -1, 8 should be negative. 7 + -8 = -1
So

factored out is (y+7x)(y-8x)
We can check this using FOIL
F = (y)(y) =

O = (y)(-8x) = -8xy
I = (7x)(y) = 7xy
L = (7x)(-8x) =


Combine like terms
It will be 115 because it adds up to 180