Question

The value of $\left(0.3\right)\left(0.3\right)-2\left(0.3\right)\left(0.2\right)+\left(0.2\right)\left(0.2\right)$

• A. $0.1$
• B. $0.01$
• C. $1$
• D. $0.1\times 0.1$

Answer 1

Answer: (B), (D)

The correct options are
B $0.1\times 0.1$
D $0.01$

$0.3\times 0.3-2\times 0.3\times 0.2+0.2\times 0.2$

$=(0.3{)}^2-2\times 0.3\times 0.2+(0.2{)}^2$

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

$=(0.3-0.2{)}^2$

$=(0.1{)}^2$

$=0.1\times 0.1$

$=\mathrm{0.01.}$

$\therefore TheoptionBandDbotharecorrect.$