Question

3.12 x 3.12 + 6.24 x 6.88 + 6.88 x 6.88 = .....

• A. 100
• B. 10
• C. 10.10
• D. 100.10

Answer 1

Answer:

A. 100

(a+b)² =a²+2ab+b² = (3.12+6.88)² =10² = 100