Homework Help: Math(Please help)

Posted by Hannah on Thursday, September 9, 2010 at 8:56pm.

1) An expression that occurs in calculus in given. Reduce the expression to lowest terms.

(2x + 5) 4x - 2x^2(2) / (2x+5)^2

I have no idea what to do for this.

2) Simplify the expression. Express the answer so that only positive exponents occur. Assume that all variables are positive.

(-3 x^4/7) ^4 / x^-1/2

I know that (-3)^4 would be 81 but I do not know what else to do.

Math(Please help) - bobpursley, Thursday, September 9, 2010 at 9:15pm
on the first, I have no idea what the numerator is.

On the second
(-3)^4 (x^4/7)^4 (x^1/2)=
81* x^(16/7 + 1/2)

YOu can combine that x exponent.

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