Answers edited by Eivind K.
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How do you simplify #(10^(1/3))^(1/2)#?
How do you solve y = 2x + 9 and 2x - y = -9?
How do you simplify #(6) (3x-y) - (4)(2x+y)#?
What are the extrema of #f(x)=(x - 4)(x - 5)# on #[4,5]#?