Question

8/7 Efectuaţi:
a) 7x^2+11x^2-13x^2-16x^2+18x^2=

b) 2x^3+5x^3-12x^2+25x^3+(19x^3-27x^3)=

c)-9a^2+14a^2+(12a^2+5a^2)-(-8a^+21a^2=

d) (19x^2-7x^2-15x^2)-(24x^2-9x^2=

Dau coroană
Merci
PS:URGENTTT

Answer 1

a)7x²+11x²-13x²-16x²+18x²=5x²+2x²=7x²

b)2x³+5x³-12x²+25x³+(19x³-27x³)=
2x³+5x³-12x²+25x³-8x³=7x³-12x²+17x³=24x³-12x²

c)-9a²+14a²+(12a²+5a²)-(-8a²+21a²)=
-9a²+14a²+(17a²)-(13a²)=-9a²+14a²+17a²-13a²=5a²+4a²=9a²

d)(19x²-7x²-15x²)-(24x²-9x²)=
-3x²-15x²=-18x²
sucees