Question

Can someone please help me?? I have a huge test coming up and I need to review for it. Do you know the answer? If you do, please explain it because i want to be sure the day of the test. Thanks!! 25 Points!!

Answer 1

Easy way is completing a square:

• x² + 20x - 39 = 10
• x² + 2*x*10 + 100 = 49 + 100
• (x + 10)² = 149
• x + 10 = ± √149
• x = - 10 ± √149

Correct choice is J