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djyliett [7]
3 years ago
13

2x2-2x-12=0 show expression in factored form show work what do the solutions mean

Mathematics
2 answers:
m_a_m_a [10]3 years ago
8 0

Answer:

3 and -2

Step-by-step explanation:

  • 2x²-2x-12=0
  • x²-x-6=0
  • x²+2x - 3x-6=0
  • x(x+2)-3(x+2)=0
  • (x-3)(x+2)=0
  • x-3=0 ⇒ x= 3
  • x+2=0 ⇒ x= -2
Nookie1986 [14]3 years ago
6 0

Answer:

x=  −2 or x=3

Step-by-step explanation:

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Read 2 more answers
Factor completely.
Marta_Voda [28]
<span>x^2 - 3x - 28 = </span><span>(x - 7)(x + 4)

answer
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8 0
3 years ago
If y varies inversely with x and y=2 when x=5, what is the value of x when y=3?
Nostrana [21]

Answer:

Step-by-step explanation:

Method

Inversely in this sentence means

y = k/x    

So you first step is to find the value of k. You do that by setting up an inverse relationship with y = 2 , x = 5

2 = k/5                     Multiply both sides by 5

2*5 = 5*k/5

10 = k

Now you are able to answer the question.

  • k = 10
  • y = 3
  • x = ?

y = 10/x

3= 10/x                      Multiply both sides by x

3*x = x * 10/x

3x = 10                      Divide both sides by 3

3x/3 = 10/3

x = 3.33 or x = 3 1/3

Answer

x = 3.33 or x = 3  1/3

8 0
2 years ago
2 significant digits for 8.45
natulia [17]
8.5, since there are 2 significant digits, the only 2 numbers would be 8 and 4, so round at 4 since 5 isn't included by is above and equal to 5
5 0
3 years ago
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