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2010-04-03T15:41:23+02:00
A) x²+5y
b) 1/4x(-2)³abcxb²a=1/4x-8a²b³cx
c)-3(4a-b)= -12a+3b=6+21=27
d)(7x²-6x)-(2x-9x²)=7x²-6x-2x+9x²=16x²-8x=8x(2x-1)
e)18x+27y-9=3(6x+9y-3)
f)4(3x-y²)-3(6x-2y²)=12x-4y²-16x+6y²=2y²-4x
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2010-04-03T16:21:14+02:00
A) x²+5y
b) 1/4x(-2)³abcxb²a=1/4x-8a²b³cx
c)-3(4a-b)= -12a+3b=6+21=27
d)(7x²-6x)-(2x-9x²)=7x²-6x-2x+9x²=16x²-8x=8x(2x-1)
e)18x+27y-9=3(6x+9y-3)
f)4(3x-y²)-3(6x-2y²)=12x-4y²-16x+6y²=2y²-4x