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Dovator [93]
4 years ago
14

X^2+2x-5=0 quadratic form

Mathematics
1 answer:
julsineya [31]4 years ago
3 0

Answer:

-1+√6

-1-√6

Step-by-step explanation:

x²+2x-5=0

x=(-2±√(2²-4(-5)))/2=(-2±√(4+20))/2=(-2±√24)/2

x₁=(-2+√24)/2 or x₂=(-2-√24)/2

x₁=(-2+2√6)/2 or (-2-2√6)/2

x₁=-1+√6 or x₂=-1-√6

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Which techniques can be used to evaluate the expression 12.75/<br><br> 1.5
sergeinik [125]

Answer:

8.5

Step-by-step explanation:

Given the expression 12.75/1.5. The technique in solving the division expression is as shown

First we can write the decimals as fraction as shown;

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12.75/1.5 = (1275/100)÷(15/10)

12.75/1.5 = 1275/100×10/15

12.75/1.5 = 1275/10 × 1/15

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Hence the result of the division is 8.5

6 0
3 years ago
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pashok25 [27]

Answer:

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Step-by-step explanation:

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  ∠CEA = 103°

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Step-by-step explanation:

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Step-by-step explanation:

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