Discuss Forum

1. a+b=7,ab=10

  • A. 9
  • B. 9
  • C. 9
  • D. 9

Answer: Option A

Explanation:

(a - b)² = (a + b)² - 4ab

= 7² - 4×10

= 49 - 40

= 9 .

Post your comments here:

Name:
Mobile:
Email:(Optional)

» Your comments will be displayed only after manual approval.