Zadanie a) (10x²+7x-5)+(12x²-7x+1)=
b) -(12a²+14a+7b-13)-(12a²-2a+7b+5)=
c) 10y-(0,3x-5y+9)+(2x-8y+1)=
d) 5(3x²+2x-4)-3(8x²-2x-8y+1)=
e) -2(-6x²+7x-1)-3(2x²-3x+7)=
źródło:
Jakie jest polecenie do zadania? Są wyrażenia algebraiczne i co z nimi począć?
(10x^2+7x-5)+(12x^2-7x+1)=10x^2+7x-5+12x^2-7x+1=22x^2-4
-(12a²+14a+7b-13)-(12a²-2a+7b+5)=
10y-(0,3x-5y+9)+(2x-8y+1)=
5(3x²+2x-4)-3(8x²-2x-8y+1)=
-2(-6x²+7x-1)-3(2x²-3x+7)=
a) (10x^2+7x-5)+(12x^2-7x+1)=10x^2+7x-5+12x^2-7x+1=22x^2-4 b) -(12a^2+14a+7b-13)-(12a^2-2a+7b+5)=-12a^2-14a-7b+13-12a^2+2a-7b-5=-24a^2-12a-14b+8 c) 10y-(0,3x-5y+9)+(2x-8y+1)=10y-0,3x+5y-9+2x-8y+1=1,7x+7y-8 d) 5(3x^2+2x-4)-3(8x^2-2x-8y+1)=15x^2+10x-20-24x^2+6x+24y-3=-9x^2+16x+24y-23 e) -2(-6x^2+7x-1)-3(2x^2-3x+7)=12x^2-14x+2-6x^2+9x-21=6x^2-5x-19