Mnożenie sum algebraicznych :
1.Oblicz :
a> (√5+2√3)(2√5-√3)+(6-3√15)
2.Wykonaj działania :
A> -5x²+3x(x-1)+(2x-1)(x+3)
B> 3y²-2x(x+2y)-(x-y)(2x+y)
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1 a) (√5+2√3)(2√5-√3)+(6-3√15)=10-√15+4√15-6+6-3√15=10
2 a) -5x²+3x(x-1)+(2x-1)(x+3)= -5x²+3x²-3x+2x²-x+6x-3=2x-3
b) 3y²-2x(x+2y)-(x-y)(2x+y)= 3y²-2x²+4xy-2x²-xy+2xy-y²=2y²-4x²+5xy