A multiplication is zero if and only if at least one of the factors is zero. So, in this case, the multipications equals zero when

The first equation has no real solutions, because
is a square, and thus it's positive. If you add 4 to a positive number, the result can't be zero.
The second equation has the solution

So, globally, the expression equals zero if and only if 
Answer:
the answer is k=-4 hope this helps
What you meant was the "commutative" property.
So we can say that when adding:
<em>"<u>Commutative</u> means that the order does not make any difference in the result."</em>
Example:
5 + 6 = 6 + 5
a + b = b + a
The commutative property does not hold for subtraction.
Example:
4 - 1 ≠ 1 - 4
a - b ≠ b - a
Ok, now does the commutative property hold true for multiplication?
2 x 3 = 3 x 2
2 x 3 x 4 = 4 x 3 x 2
Yes.
What about division?
12 ÷ 4 ≠ 4 ÷ 12
The commutative property does not hold for division.
Answer:
8 billetes de 20
17 billetes de 10
Step-by-step explanation:
Answer:
Check photo.
Step-by-step explanation: