Question

QUANDO A=1-\3 E B=-3, QUAL O VALOR NUMERICO DA expresao a^2 -ab=b^2

Answer 1

${a}^{2} - ab - {b}^{2} \\ ={( - \frac{1}{3})}^{2} - (-\frac{1}{3}).( - 3) - { ( - 3)}^{2} \\ = \frac{1}{9} + 1 - 9 = \frac{1 + 9 - 81}{9}$

$= - \frac{71}{9}$