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artcher [175]
3 years ago
5

How do we know what sign goes outside of the bracket when factoring binomials?

Mathematics
1 answer:
Xelga [282]3 years ago
3 0
I'm assuming you're asking about negative or positive signs here. When I factor binomials, it depends on what would make factoring simpler for me. And how you're factoring the binomial too.

More often than not, it's going to be positive. For example, 4x^2 - 2x = 0. That would factor out to be 2x(2x-1) = 0. The sign outside is going to be positive because it's simpler to solve that way. Here, x is equal to 0 and equal to 1/2. Taking out a negative in this case would complicate the solving process.
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The midpoint M of CD has coordinates (6, 6). Point D has coordinates (10, 4). Find the coordinates of point C.
Firdavs [7]

Answer:

(2,8)

Step-by-step explanation:

The midpoint of a line segment with endpoints (a,b) and (c,d) is

((a+c)/2   ,  (b+d)/2) .

So one endpoint is given and the midpoint is given, we are asked to find the other midpoint.

(10+c)/2=6                      (4+d)/2=6

10+c=12                           4+d=12

c=2                                      d=8

(2,8) is the other endpoint

5 0
3 years ago
. Fast train gets from the starting to the final station in 4 hours and 20 minutes. The slower local train, whose average speed
madreJ [45]

Answer:

Fast train speed: 69 km/h

Slow train speed: 39 km/h

Step-by-step explanation:

Fast train:

-Time: 4.33

-Speed: x

-Distance: 4.33x

Slow train:

-Time:  7.66

-Speed: x - 30

-Distance: 7.66(x - 30)

7.66(x - 30) = 4.33x

7.66x - 229.8 = 4.33x

3.33x = 229.8

x = 69

3 0
2 years ago
There are $15$ gymnasts in the Olympic women's competition, including $4$ Americans. The gold medal goes to first place, silver
gulaghasi [49]

Answer:

There are 220 ways by which the medals can be awarded to three of the 15 gymnast, if exactly one of the Americans wins a medal

Step-by-step explanation:

From the question, we have;

The number of gymnast in the Olympic women's competition = 15

The number of the gymnast who are Americans = 4

The number of medals awarded = 3 medals

The number of ways hat the medals can be awarded to the three of the gymnast if exactly one of the Americans wins a medal is given as follows;

The number of ways one of the medals can be won by one of the four Americans = ₄C₁ = 4 ways

The number of ways the other two medals can be won by the remaining 11 gymnast = ₁₁C₂ = 55 ways

Therefore, the total number of ways, 'N', the medals can be awarded to three of the 15 gymnast, if exactly one of the Americans wins a medal is given as follows;

N = ₄C₁ × ₁₁C₂

∴ N = 4 × 55 = 220

3 0
2 years ago
Someone help me understand this
zheka24 [161]

Answer:

Step-by-step explanation:

for reflection around x-axis.

(x,y)→(x,-y)

so P' is (-7,4)

4 0
2 years ago
Point X is located at (2, −6), and point Z is located at (0, 5). Find the y value for the point Y that is located one over five
soldi70 [24.7K]
The answer would be B, -3.8.
HOPE THIS HELPS! ^_^
8 0
2 years ago
Read 2 more answers
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