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umka21 [38]
1 year ago
4

2b3 + 5 = 2 (3)³ + 5=

Mathematics
1 answer:
Snezhnost [94]1 year ago
3 0

Answer:

b=3

Step-by-step 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

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