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Question
Multiply and write the answer in the simplest form.
`3sqrt 12 xx 7 sqrt 15`
Solution
`3sqrt 12 xx 7 sqrt 15`
`= 3 sqrt (4 xx 3) xx 7 sqrt(5xx3)`
`=3xx2xxsqrt3xx7sqrt5xxsqrt3`
`=3xx2xx7xxsqrt3xxsqrt3xxsqrt5`
`=42xx3xxsqrt5`
`= 126 sqrt 5`
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