If a-b=3 and a2+b2=29, find the value of ab.

A    10

B    12

C    15

D    18

Solution

Correct Answer: Option A

 

a-b=3

(a-b)2 = 9

a2+b2- 2ab =9

29-2ab=9

ab =20/2=10

 

Practice More Questions on Our App!

Download our app for free and access thousands of MCQ questions with detailed solutions

Download Android App Login to Website

Related Topics