I realize I haven't really dealt with simplifying non-linear expressions too much, and am just plain stuck. I'm having trouble with the algebra to simplify this expression:
$$\left(\frac{3}{8}r + \frac{1}{2}h\right)^2 - \left(\frac{3}{8}r\right)^2$$
To this one:
$$\frac{3r * 2h}{8}h$$
Could anyone briefly explain the rules to collect these terms together?
Answer
HINT :
$$A^2-B^2=(A-B)(A+B).$$
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