3 years ago

Tractice writing as a qua

Mathematics

1 answer:

Firlakuza [10]3 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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