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11-21-2001, 03:29 AM
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#1 |
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Member (6 bit)
Join Date: Jul 2001
Location: Brisbane, Australia
Posts: 36
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use your heads
Hey guys, I have some maths problems that I can't work out can someone help?
Factorise these by any method: 16b²-81 and 1.5x²+x-2 Thanks |
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11-21-2001, 10:54 PM
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#2 |
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Member (11 bit)
Join Date: Oct 2000
Location: Yorba Linda, CA
Posts: 1,159
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Mr. G,
The first one is the DIFFERENCE of THE SQUARES! 16b²-81 = [(4b)²-(9)²] = (4b-9)(4b+9) I will work on the second one. HTH Edrod13
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