a + b = 7 এবং a2 + b2 = 25 হলে নিচের কোনটি ab এর মান হবে?

A    12

B    10

C    6

D    কোনটিই নয়

Solution

Correct Answer: Option A

 

a2 + b2 = 25

=>(a+b)2-2ab=25

=>(7)2--2ab=25

=>-2ab=25-49

=>ab=24/2=12

 

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