Question

Calculati: - 5 * [ 3 * ( - 5 ) - 2 * ( - 7 ) + 9 * ( - 3 )] + ( - 5 ) La puterea a 2-a

Answer 1

$-5 \cdot [3 \cdot (-5)-2 \cdot (-7)+9 \cdot (-3)]+(-5)^2= \\ =-5 \cdot (-15+14-27)+25= \\ =-5 \cdot (-1-27)+25= \\ =-5 \cdot (-28)+25= \\ =140+25= \\ =165$