where u is a real number

Algebra
Tutor: None Selected Time limit: 1 Day

(u-7)^3-40=0 write where u is a real number

Jun 15th, 2015

Thank you for the opportunity to help you with your question!

(u-7)^3=40, note when -40 crosses the equal sign then it changes its sign to +40.

(u-7)=40^(1/3)

but 40^(1/3)=3.41995

therefore, u-7=3.41995

u=3.41995+7

u=10.41995

Please let me know if you need any clarification. I'm always happy to answer your questions.
Jun 15th, 2015

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