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Elodia [21]
3 years ago
13

Factor the following expression: x2-4x-21

Mathematics
1 answer:
natka813 [3]3 years ago
3 0

Answer:

(x − 7)(x + 3)

Step-by-step explanation:

Step 1: You need to find out what to numbers add up to −4 and multiply −21?

−7 and 3

Step 2: Just rewrite the expression using the above and you're done!

(x − 7)(x + 3)

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Given: 3x + 1 = -14; Prove: x = -5
MrRissso [65]

Answer:

x = -5

Step-by-step explanation:

Solve for x:

3 x + 1 = -14

Subtract 1 from both sides:

3 x + (1 - 1) = -14 - 1

1 - 1 = 0:

3 x = -14 - 1

-14 - 1 = -15:

3 x = -15

Divide both sides of 3 x = -15 by 3:

(3 x)/3 = (-15)/3

3/3 = 1:

x = (-15)/3

The gcd of -15 and 3 is 3, so (-15)/3 = (3 (-5))/(3×1) = 3/3×-5 = -5:

Answer:  x = -5

7 0
3 years ago
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Find the product of –1.5x and –0.25x.
Lana71 [14]

Answer:

0.375x^2

Step-by-step explanation:

(-1.5x)(-0.25x)  

= (-1.5)(0.25)(x)(x)

= 0.375x^2

8 0
2 years ago
Consider the function on the graph PLEASE HELP ME!!!!!!!!!!
AleksAgata [21]

Answer:-10 to positive 10

Step-by-step explanation:

i do not know if im right but i tried.. sorry

8 0
2 years ago
Which expression is equivalent to 28 + 7? Prove your answer by showing your work.
OverLord2011 [107]

Answer:

ok so first lets find the answer to the original question

28+7=35

so lets find which one is equal to 35

7(4+1)=28+7=35 yes

4(7+1)=28+4=32 no

4(7+3)=28+12=40 no

7(4+7)=28+49=77 no

a is the answer

Hope This Helps!!!

6 0
3 years ago
What is the Answer to four times four
34kurt
16 is the answer to this question.
7 0
4 years ago
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