Zadanie 6.. Proszę, w załączniku. Ja tego nie czaję. Z obliczeniami!!!
Daję naj! :)
a)
x*x-[0,5y(x-y)+xy+0,5x(x-y)] = x²-(0,5xy-0,5y²+xy+0,5x²-0,5xy) = x²-(0,5x²-0,5y²+xy) = x²-0,5x²+0,5y²-xy = 0,5x²+0,5y²-xy
b)
x*x-0,5*(x-y)(x-y) = x²-0,5(x²-2xy+y²) = x²-0,5x²+xy-0,5y² = 0,5x²-0,5y²+xy
c)
(a+b)(a+b)-(2*0,5*a*a+0,5*b*b) = a²+2ab+b²-(a²+0,5b²) = a²+2ab+b²-a²-0,5b² =
0,5b²+2ab
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a)
x*x-[0,5y(x-y)+xy+0,5x(x-y)] = x²-(0,5xy-0,5y²+xy+0,5x²-0,5xy) = x²-(0,5x²-0,5y²+xy) = x²-0,5x²+0,5y²-xy = 0,5x²+0,5y²-xy
b)
x*x-0,5*(x-y)(x-y) = x²-0,5(x²-2xy+y²) = x²-0,5x²+xy-0,5y² = 0,5x²-0,5y²+xy
c)
(a+b)(a+b)-(2*0,5*a*a+0,5*b*b) = a²+2ab+b²-(a²+0,5b²) = a²+2ab+b²-a²-0,5b² =
0,5b²+2ab