Question
Given that x = 80, y = -35 and z = -45, Determine the
value of [(x³ + y³ + z³)/10³]Solution
ATQ;
As (x + y + z) = (80 – 35 – 45) = 0
So, x³ + y³ + z³ = 3xyz
So, (x³ + y³ + z³) = {3 × 80 × (-35) × (-45)} = 378000
So, required value = {(x³ + y³ + z³)/10³} = (378000/1000) = 378
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