Question

Shauna solved the polynomial equations given in the table.

Determine whether each polynomial is correct. Select Correct or Incorrect for each equation.
Equation
-
(5a - 8) + (2a² + 2a − 1) = 2a² + 7a - 9
(6² +6b-4) (3b +6²) = 26² +36-4
(9c-4c²) - (2c² + c) = -6c² + 10c
-
Correct
Incorrect

Answer 1

(5a - 8) + (2a² + 2a − 1) = 2a² + 7a - 9 - correct.

Explanation:

(5a - 8) + (2a² + 2a − 1) = 2a² + 7a - 9 - correct;

(6² +6b-4) (3b +6²) = 26² +36-4 - incorrect (correct is: 18b²+...36²);

(9c-4c²) - (2c² + c) = -6c² + 10c - incorrect (correct is: -6c² + 8c).