Question

2b3 + 5 = 2 (3)³ + 5=

Answer 1

b=3

Explanation:

`2b^(3)+ 5=2(3)^(3)+5\\ 2b^(3)+5= 2(27)+5\\ 2b^(3)+5=54+5\\ 2b^(3)+5=59\\ 2b^(3)=59-5\\ 2b^(3)= 54\\ b^(3)= 54/2\\ b^(3)=27\\\sqrt[3]{b}=\sqrt[3]{27}\\ b=3`