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Tomtit [17]
3 years ago
7

X2 + 8x + 20 = 0 Quadratic equation

Mathematics
1 answer:
beks73 [17]3 years ago
8 0

Answer:

The answer is x = -4 ± 2i

Step-by-step explanation:

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Slove by using elimination <br> 3x+7y=27 <br> -3x+y=21
tankabanditka [31]

Answer:

x = -5

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Step-by-step explanation:

3x + 7y = 27      --------------(I)

-3x + y = 21        -----------(II)

Add equation (I) & (II) and so x will be eliminated and we can find the value of y.

(I)      3x + 7y = 27    

(II)    <u> -3x + y = 21  </u>      {add}

                8y = 48

                   y = 48/8

                   y = 6

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