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January 30, 2015

January 30, 2015

Posted by **Clark** on Tuesday, October 18, 2011 at 4:13am.

- Algebra LCD -
**drwls**, Tuesday, October 18, 2011 at 5:06amFirst, fully factor both.

(3x^4)-27x^2 = 3x^2(x^2 - 9)

= 3x^2*(x+3)(x-3)

(x^3)-3x^2 = x^2(x-3)

The LCD is 3x^2*(x-3)(x+3).

It is the product of all factors appearing in both expressions. Factors that appear in both only appear once in the LCD.

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