Zredukuj wyrazy podobne: a) 3a+2a-b-5a= b) 3x-4,1-(-4x+5,9)= c) 3xy-2x4y+(-5xy+7x-4y)= d)(x2-2x+4)+(x2+2x-1)= e)(x2-7x+8)-(2x2-6x-8)= f) x2-y+2x2-3y+x2+5y+ x2- to znaczy do kwadratu
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a) 3a+2a-b-5a= -b
b) 3x-4,1-(-4x+5,9)=3x-4,1+4x-5,9=7x-10
c)
d) = x2-2x+4+x2+2x-1=2x2+4-1
e) x2-7x+8-2x2-6x-8= -x2-13x
f) x2-y+2x2-3y+x2+5y+x2=5x2+1y