Question

Tractice writing as a qua

ASSIGNMENT
Use substitution to write an equivalent quadratic equation.
(3x + 2)^2+ 7(3x + 2) - 8 = 0
DONE

Answer 1

The answer would be the second option on the drop down menu.

Explanation:

Did the assignment

Answer 2

• z = 3x+2
• z^2 +7z -8 = 0

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