Question

10 ejercios de valor numerico ejemplo (3a+4b+5c-3a+6b-7c)........10 ejercios de agrupacion

Answer 1

1. (-2x³+7x²-x)+(2x³-8x²+x-6) 
= -2x³ +2x³ +7x² -8x² -x +x -6 
= -x²-6

2. (12xy+3x²y-4x³)+(4x³-3x²y-10xy)
= 3x²y -3x²y +12xy -10xy -4x³ +4x³
=2xy

3. [(2a-b)+(2a-c)]+[4a+b+c] 
=(2a +2a -b -c) +4a +b +c
= 4a +4a -b +b -c +c
= 8a

4. [(6x+7)-(-2x+4)]-(8x-5)
=(6x +2x +7 -4) -8x +5
=8x -8x +3 +5
= 8

5. -4x-{-3x-[(4x-2y)-(-2x+y)]}
= -4x - [ -3x - (4x +2x -2y -y)]
= -4x - [ -3x - (6x -3y)]
= -4x - (-3x -6x +3y)
= -4x - (-9x +3y)
= -4x +9x -3y
= 5x-3y

6. 3x-4y-{x-(x+y)-[(-2x+y)-x]-3y}
= 3x -4y - [ x -x -y -( -2x +y -x) -3y ]
= 3x -4y - ( -y +2x -y +x -3y)
= 3x -4y - ( 3x -5y)
= 3x -3x -4y +5y
= y

7. (3a-4b)-{[a-(2a+b)]-a}
= 3a -4b - [ (a -2a -b) -a]
= 3a -4b - ( -a -a -b)
= 3a -4b - (-2a -b)
= 3a +2a -4b +b
= 5a-3b

8. 2a+{ -[5b+(3a-c)+2-(-a+b-c-4)]-(-a+b)}
= 2a +[-(5b +3a -c +2 +a -b +c +4) -(-a +b)]
= 2a +[-(3a +a +5b -b -c +c +4 +2) +a -b]
= 2a +[-(4a +4b +6) +a -b]
= 2a +(-4a -4b -6 +a -b)
= 2a -3a -5b -6
= -a -5b -6

9. -[3m+(-m-(n-m-2)}+{-(m+n)+(-2n+3)}]
= -[3m + (-m -n +m +2) + (-m -n -2n +3)]
= -[3m + (-n +2) + (-m -3n +3)]
= -(3m -n +2 -m -3n +3)
= -(2m -4n +5)
= -2m +4n -5

10. (8x+5m-3x²)-(7x-3m+5x²)=
= 8x+5m-3x²-7x+3m-5x²
= 8x -7x +5m +3m -3x² -5x²
= x+8m-8x²

No sé si los querías resueltos pero ahí te los dejo, ojalá te sirvan espero haberte ayudado.