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Novosadov [1.4K]
2 years ago
14

Can you help solve this and provide work? -t (5t-7) =-5

Mathematics
1 answer:
Llana [10]2 years ago
5 0
    -t(5t - 7) = -5
          -1         -1
     t(5t - 7) = 5
  t(5t) - t(7) = 5
     5t² - 7t = 5
5t² - 7t - 5 = 0
t = -(-7) ± √(-7)² - 4(5)(-5)
                 2(5)
t = 7 ± √49 - 4(-25)
               10
t = 7 ± √49 + 100
             10
t = 7 ± √149
         10
t = 0.7 ± 0.1√149
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maks197457 [2]
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2 years ago
2x3 + x2 + 7x - 6)-(- 2x + 10x + 10x+9)​
AVprozaik [17]

Answer:

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Step-by-step explanation:

Step 1: Write out expression

2x³ + x² + 7x - 6 - (-2x + 10x + 10x + 9)

Step 2: Distribute negative

2x³ + x² + 7x - 6 + 2x - 10x - 10x - 9

Step 3: Combine like terms (x)

2x³ + x² + 9x - 10x - 10x - 9 - 6

2x³ + x² - x - 10x - 9 - 6

2x³ + x² - 11x - 9 - 6

Step 4: Combine like terms (constants)

2x³ + x² - 11x - 15

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3 years ago
How do I do this and what’s the answer
lakkis [162]

Answer:

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Step-by-step explanation:

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