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McGraw Hill Integrated II, 2012 View details

1. Solving Quadratic Equations by Factoring

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Exercise 103 Page 177

If sqrt(a) and sqrt(b) are real numbers, then sqrt(a)*sqrt(b)=sqrt(ab).

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Practice makes perfect

The rule regarding multiplying radical expressions states: "If sqrt(a) and sqrt(b) are real numbers, then sqrt(a)*sqrt(b)=sqrt(a b)." 2sqrt(3)* sqrt(27)=2sqrt(3* 27) = 2sqrt(81) Notice that 81 is a perfect square, so we can easily calculate the root.

2sqrt(81)

CalcRoot

Calculate root

2(9)

Multiply

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