P O M O C Y ! ; D P R O S Z E !.!!!
1.(x+1)(x-2)+(x+2)(x-1)=...
2. (5k+n)(k-2n)-k(4k+n)=...
1) x2-2x+x2-2= x4-4
2) 5k2-2n2-4k2-kn= k2-2n2
;)
1
x2- 2x-2+x-2 +x2-x+2x-2 = 2x2- 6
(x2 oznacza x do potegi 2)
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1) x2-2x+x2-2= x4-4
2) 5k2-2n2-4k2-kn= k2-2n2
;)
1
x2- 2x-2+x-2 +x2-x+2x-2 = 2x2- 6
(x2 oznacza x do potegi 2)