SOLUTION: x* means 5x^2-x. What does (y+3)* mean?

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Question 813472: x* means 5x^2-x. What does (y+3)* mean?
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
x* = 5x^2-x

(y+3)* = 5(y+3)^2 - (y+3) ... replace ALL copies of x with y+3

(y+3)* = 5(y^2+6y+9) - (y+3)

(y+3)* = 5y^2+30y+45 - y-3

(y+3)* = 5y^2+29y+42