Zapisz w jak najprostszej postaci :
a)2(x-y)(x+y)-(x-2y)^
b)(2a-b)^-2(a-b)(2a+b)
c)5(s+3t)(3t-s)-(s+2t)^
d)(z+0,3)^+(z+0,2)(0,2-z)
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2x-2y+2x+2y - x^+4y =4x+4y - x^
4a-b^-2a+2b-4a-2b = -10a-2b-b^
5s+15t+15t-5s-s^-4t = 26t-s^
z^+0,09+0z-z+0,2z-0,2z= 0,09+z^-1z=0,91z+z^
a)2x-2y+2x+2y - 2x+42y
b)4a-b^-2a+2b-4a-2b
c)5s+15t+15t-5s-s^-4t
d)z^+0,03^+0z-z+0,2z-0,2z
wydaje mi się że tak to ma być ! :))