Question

$10.1^2=?$

• A. 101.2
• B. 102.1
• C. 100.01
• D. 102.01

Answer 1

Answer:

D. 102.01

$(a+b)^2=a^2+2ab+b^2$

$10.1^2=(10+0.1)^2$

$=10^2+2\times10\times0.1+0.1^2$

$=100+2+0.01$

$=102.01$