Answer:
3^3+2(3)(7)(-3)-5(-3)^2=-144
hope this is your required answer
-144
Step-by-step explanation:
a³ + 2abc - 5c² = (3)³ + 2(3)(7)(-3) - 5(-3)²
= 3³ + (-126) - 5(-3)²
= 27 + (-126) - 45
= (-99) - 45
= -144
your welcome
