a) 5(2+x)2+(4-x)(4+x)-2(1-x)2
b) (2x+y)2-3(x-y)2+(-2x-3y)(-2x+3x)
c) (a-2)2-(a+2)2-(2a-3)2
d) (a-2)2+(a+1)2-(a-1)2 dla a= 2
e) (a-b)2+2(a+b)(a-b)=3(a+b)2 dla a= √-3 dla b= √2
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a ) 20+10x+16+4x-4x-x^2-4+4x=20+16-4+10x+4x-4x+4x-x^2=32+14x-x^2
b) 4x+2y-6x+6y+4x^2-6x^2+6xy-6xy=4x-6x+2y+6y+4x^2-6x^2=-2x+8y-2x^2
c) 2a-4-2a+4-4a+6=-4a+6
d) 4a-4+2a+2-2a+2=4a=4*2=8
e) 2a-2b+2a^2-2ab+2ab-2b^2=6a+6b
2√3-2 √2+2√3^2-2√2^2=6√-3+6√2
2√3-2 √2+6-4=6√3+6√2
2√3-2 √2+2=6√3+6√2
2√3-2 √2-6√3-6√2=-2
-8√3-8 √2=-2 I/(-2)
4√3+4 √2=1