(1 point) Vilka av foljande pastaenden ar sanna for alla reella tal , y och z, givet att namnaren ar skild fran 0? A. +2y
(1 point) Vilka av foljande pastaenden ar sanna for alla reella tal , y och z, givet att namnaren ar skild fran 0? A. +2y _ 1+2y 5r 5 B. (5x + 2y)? = 25x2 + 20xy + 4y- x2-y2 [ C. = 1 (cty)(x-y) D. 5'+(x-y)2 5+(x-y) =5+x-y E. (x ty + z)? = 2 + 92 + z2 + 2xy + 2xz + 2yz F. - + rty y
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