(2x)^3+y^3
= (6)^3 + (-5)^3
= 216 + (-125)
= 91
If you typed the question correctly, and those are the values of x and y, then 91 is the correct answer.
Evaluate when x=3 and y=-5
(2x)^3+y^3
My figuring:
2*3=6, 6*6*6=216
(-5)(-5)(-5)=-125
Solution: 91
According to my teacher, the answer should be -7, not 91. Who is right, and why?
2 answers
Ok thank you