Question

$\frac{{\left(0.35\right)}^2-{\left(0.03\right)}^2}{0.19}=?$

• A. 0.32
• B. 0.48
• C. 0.76
• D. 0.64

Answer 1

The correct option is D 0.64

$\frac{(0.35{)}^2-(0.03{)}^2}{0.19}$=$\frac{(0.35+0.03)(0.35-0.03)}{0.19}$ $[a^2-b^2=(a+b\left)\right(a-b\left)\right]$

$=\frac{\left(0.38\right)\left(0.32\right)}{0.19}$

$=2\times 0.32$

$=0.64$

So the correct answer will option D