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Ierofanga [76]
3 years ago
11

cho phương trình 2x^2-5x-9 có hai nghiệm là x1,x2. không giải phương trình, hãy tính giá trị của biểu thức A= x1^2+x2^2-2x1x2^2

-2x1^2x2
Mathematics
1 answer:
irga5000 [103]3 years ago
8 0

Step-by-step explanation:

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https://youtu.be/f_kgUUaMZlw

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zimovet [89]
From the given, it is stated that after Amelia took 14 out of the box, Ramon took half of those which remained and he had 16 tiles. The number of tiles left after Amelia took hers is equal to twice of 16 which is equal to 32 tiles. 

To determine the number of tiles during the start, we can add the 14 tiles from the calculated 32 tiles.
    
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<em>Answer: 46 tiles</em>
4 0
3 years ago
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Hello.

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