Question

Calcule
${2}^{ - 2} + ( \frac{1}{3} ) {}^{2}$
​

Answer 1

2^-2 + (1/3)^2
1/2^2 + 1/9
1/4 + 1/9
(1*9+ 1*4)/(4*9)
(9+4)/36
13/36