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Romashka-Z-Leto [24]
3 years ago
7

( 6x ^2 - x + 3 ) +( - 2x + x^2 - 7 )​

Mathematics
1 answer:
alexandr1967 [171]3 years ago
8 0

Answer:

7x² - 3x - 4

Step-by-step explanation:

<u>Step 1: Write expression</u>

(6x² - x + 3) + (-2x + x² - 7)

<u>Step 2: Combine like terms (x²)</u>

7x² - x + 3 - 2x - 7

<u>Step 3: Combine like terms (x)</u>

7x² - 3x + 3 - 7

<u>Step 4: Combine like terms (constants)</u>

7x² - 3x - 4

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28 squared minus 39x minus 80 equals 0​
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Answer:

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Step-by-step explanation:

28 squared minus 39x minus 80 equals 0​  

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704-39x=0  Subtract the numbers

-39x=-704  move the constant to the right hand side and change it's sign

Divide on both side to get x = 704/39

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3 years ago
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Step-by-step explanation:

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