Answer: -56
Step:
Plug in the numbers into the equation
-3(5)² + 4(5)(1)-1³
Any expression multiplied by 1 remains the same. Evaultuate the power.
-3×25+4×5-1³
Multiply the numbers. 1 raised to any power equals 1.
-3×25+20-1
Multiply the numbers
-75+20-1
Calcualte the sum or difference and you get -56.
Hope this helpsʕ•ᴥ•ʔ