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SSSSS [86.1K]
2 years ago
13

Solve using the quadratic formula 2x^2 + 7x - 15 = 0

Mathematics
1 answer:
marissa [1.9K]2 years ago
3 0

Answer:

1.5 or -5

Step-by-step explanation:

2x²+7x-15=0

Divide by 2:

x²+7x/2-15/2=0

x=-7/2/2 ± √49/4(4)+15/2

  =-7/4 ± √49/16+120/16

  =-7/4± √169/16=-7/4 ±13/4

  =6/4 or -20/4

   =1.5 or -5

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The population of a certain species of bird in a region after t years can be modeled by the function P(t)= 1620/1+1.15e^-0.042t
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Answer:

A

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3 years ago
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