Question

A² - 2AB + B² sendo A=2 e B= -\frac{1}{2}

Answer 1

A² - 2AB + B²

2² - 2(2*$\frac{-1}{2}$) + ($\frac{-1}{2}$)²

4 - 2 (-1) + $\frac{1}{4}$

4 + 2 + $\frac{1}{4}$

6 + $\frac{1}{4}$

$\frac{25}{4}$