Oblicz:
5a-[3a²+4a-(-3a+4a)]=
5a-[3a² + 4a - (-3a + 4a)]= 5a-[3a² + 4a +3a -4a]= 5a-3a² - 4a -3a +4a=- 3a² +2a= -3*(-1/2)² + 2*(-1/2)= -3*(-1/8)-1=+3/8 -1= -5/8
5a-[3+4a-(-3a+4a)]=
5a-( 3+4a+3a-4a)=
5a- 3-4a-3a+4a=
2a-3
myśle że dobrze..
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5a-[3a² + 4a - (-3a + 4a)]= 5a-[3a² + 4a +3a -4a]= 5a-3a² - 4a -3a +4a=
- 3a² +2a= -3*(-1/2)² + 2*(-1/2)= -3*(-1/8)-1=+3/8 -1= -5/8
5a-[3+4a-(-3a+4a)]=
5a-( 3+4a+3a-4a)=
5a- 3-4a-3a+4a=
2a-3
myśle że dobrze..