Question

The value of $0.768\times 0.768-2\times 0.768\times 0.568+0.568\times 0.568$ is:

• A. $0.4$
• B. $0.04$
• C. $0.004$
• D. $0.0004$

Answer 1

Answer: (B)

$0.04$

Given,

$0.768\times 0.768-2\times 0.768\times 0.568+0.568\times 0.568$

$=(0.768{)}^2-2\times 0.768\times 0.568+(0.568{)}^2$

$Usingidentity\because a^2-2ab+b^2=(a-b{)}^2$

$=(0.768-0.568{)}^2$

$=(0.2{)}^2$

$=\mathrm{0.04.}$

$\therefore TheoptionBiscorrect.$