Question

evaluate 30 cube plus 20 cube-50cube

Answer 1

wr have a=30,b=20,c=-50
a+b+c=30+20+（-50）=0
30cube plus 20 cube minus 50 cube
=3*30*20*-50
=-90000

Answer 2

evaluate 30 cube plus 20 cube-50cube

minus thirty cube=-30³

plus twenty cube=20³

minus fifty cube=-50³

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a=minus thirty cube=-30³

b=plus twenty cube=20³

c=minus fifty cube=-50³

x=a+b+c

x=-30³+20³-50³

a=-27000

b=+8000

c=-125000

x=-27000+8000-125000

x=-144000