Answer and explanation

Correct answer: C. or

  1. Step 1: Factor: . Step 2. Each factor gives a root. **Answer: or . Why not the others:** The other pairs have the wrong signs; the sum of the roots must be and the product .

Practise more Algebra, Functions and Models.

Free questions with an explanation for every one, and full timed Studentereksamen STX (Denmark) mock tests.

Solve x 2+4x-5=0. | Studentereksamen STX (Denmark)