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Elden [556K]
4 years ago
11

According to the synthetic division below, which of the following statements are true? Check all that apply. -5(2 6 -8) -10 20 _

___________ 2 -4 12 A. When (2x2 + 6x - 8) is divided by (x + 5), the remainder is 12. B. When x = -5, 2x2 + 6x - 8 = 12. C. (x + 5) is a factor of 2x2 + 6x - 8. D. When x = 5, 2x2 + 6x - 8 = 12. E. (x - 5) is a factor of 2x2 + 6x - 8. F. When (2x2 + 6x - 8) is divided by (x - 5), the remainder is 12.
Mathematics
2 answers:
Sunny_sXe [5.5K]4 years ago
8 0
***(2x²+6x-8):(x+5)=2x-4
     -2x²-10x
    ⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻
         -4x-8
          4x+20
    ⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻
              12 ⇒ A. statement is true.

***When x=-5⇒2*(-5)²+6*(-5)-8=12⇒B. statement is true.

***2x²+6x-8 can also be written as (x+5)*(2x-4)+12 so (x+5) is a factor of 2x²+6x-8⇒C. statement is true.

***When x=5⇒2*5²+6*5-8=72 is not 12⇒D. statement is not true

***
(2x²+6x-8):(x+5)=2x+16
     -2x²+10x
    ⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻
              16x-8
             -16x+80
        ⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻
                     72⇒F. statement is not true

**
*E. statement is not true.





ra1l [238]4 years ago
7 0

The correct answer is A and B

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Determine whether the fractions 3 4 and 4 5 are equivalent. Question content area bottom Part 1 Select the correct choice below
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Answer: Choice A

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===================================================

Explanation:

We have the template \frac{P}{Q} = \frac{R}{S} which cross multiplies to PS = QR

So if \frac{3}{4} = \frac{4}{5} was true, then 3*5 = 4*4 must be true as well, and vice versa.

The left side 3*5 turns into 15, while the right hand side 4*4 becomes 16. The 15 and 16 don't match up.

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5 0
2 years ago
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