Question

quando a=⅓e b=-3,qual o valor numérico do expressao a² - ab²​

Answer 1

a²-ab²=a(a-b²)

$\frac{1}{3}( \frac{1}{3} - {( - 3)}^{2}) = \frac{1}{3}( \frac{1}{3} - 9) \\ = \frac{1}{3}( - \frac{26}{3}) = - \frac{26}{9}$