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natita [175]
2 years ago
9

Tractice writing as a qua

Mathematics
1 answer:
Firlakuza [10]2 years ago
3 0

Answer:

  • z = 3x+2
  • z^2 +7z -8 = 0

Step-by-step explanation:

Define ...

  z = 3x+2

Substitute for that expression in the given quadratic:

  z^2 +7z -8 = 0 . . . . . . your equivalent quadratic

_____

This equation is easily solved by factoring:

  (z +8)(z -1) = 0

  z = -8 or +1

Then x can be found from z:

  (z -2)/3 = x

  (-8 -2)/3 = x = -10/3

  (+1 -2)/3 = x = -1/3

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