Question

8. Efectuaţi calculele şi reduceţi termenii asemenea:
a) 2(3a +9b-7c)-3(4a + 5b +9c) - 5(a +2b-8c);
b)
4(2x²-3x+4)-3(3x²
c) 5(3x² - 5x+6)-4(5x²
- 4x-2) + 2(x² - 2x - 10);
- 6x + 7)-3(-x² + 2x - 2);
d) 6(-x²-3x+5)- 7(2x2 - 4x+6) + 5(5x² + 2x - 1).

Va rog mult rezolvarea completaaa!!❤️

Answer 1

Răspuns:

2(3a +9b-7c)-3(4a + 5b +9c) - 5(a +2b-8c)=

6a+18b-14c-12a-15b-27c-5a-10b+40c=

-11a-7b-c

4(2x*2-3x+4)-3(3x*2-4x-2)+2(x*2-2x-10)=

16x-12x+16-18x+12x+6+4x-4x-12=

-2x+2=-2(x-1)

5(3x*2-5x+6)-4(5x*2-6x+7)-3(-x*2+2x-2)=

30x-25x+30-40x+24x-28+6x-6x+6=

-11x+8

6(-x²-3x+5)- 7(2x² - 4x+6) + 5(5x² + 2x - 1)=

-6x²-18x+30-14x²+28x-42+25x²+10x-5=

5x²+20x-17