ALGUEM PELO AMOR DE DEUS
redução de termos semelhante
a) –[x + (7 – x) – (5 + 2x)] =
b) { 9x – [ 4x – (x – y)- 5y] + y} =
c) (3a + 2m ) – [ ( a – 2m) – (6a + 2m)] =
d) 7x³- { 3x² - x – [ 2x – { 5x³ - 6x² ) – 4x ]} =
e) 2y – { 3y + [4y – (y – 2x) + 3x ] – 4x } + 2x =
f) 8y + { 4y – [ 6x – y- (4x – 3y) – y ] – 2x } =
g) 4x – { 3x + [ 4x – 3y – (6x – 5y ) – 3x ] – 6y}
h) 3x – { 3x – [3x – (3x –y) – y ] – y} - y
Soluções para a tarefa
Olá!!!!!!!
a) –[x + (7 – x) – (5 + 2x)] =
=−[x+(−x+7)−(2x+5)]=
=−[7−(2x+5)]=
=2x−2
b) { 9x – [ 4x – (x – y)- 5y] + y} =
={9x−[(3x+y)−5y]+y}=
={9x−[3x−4y]+y}=
={(6x+4y)+y}=
=6x+5y
c) (3a + 2m ) – [ ( a – 2m) – (6a + 2m)] =
=(3a+2m)−[−5a−4m]=
=8a+6m
d) 7x³- { 3x² - x – [ 2x – { 5x³ - 6x² ) – 4x ]} =
=7x³−{(3x²−x)−[(−5x³+6x²+2x)−4x]}=
=7x³−{(3x²−x)−[−5x³+6x²−2x]}=
=7x³−{5x³−3x²+x}=
=2x³+3x2−x
e) 2y – { 3y + [4y – (y – 2x) + 3x ] – 4x } + 2x =
=2y−{3y+[(3y+2x)+3x]−4x}+2x=
=2y−{3y+[3y+5x]−4x}+2x=
=2y−{(6y+5x)−4x}+2x=
=2y−{6y+x}+2x=
=(−4y−x)+2x=
=−4y+x
f) 8y + { 4y – [ 6x – y- (4x – 3y) – y ] – 2x } =
=8y+{4y−[(−y+6x)−(−3y+4x)−y]−2x}=
=8y+{4y−[(2y+2x)−y]−2x}=
=8y+{4y−[y+2x]−2x}=
=8y+{(3y−2x)−2x}=
=8y+{3y−4x}=
=11y−4x
g) 4x – { 3x + [ 4x – 3y – (6x – 5y ) – 3x ] – 6y}
=4x−{3x+[(−2x+2y)−3x]−6y}=
=4x−{3x+[−5x+2y]−6y}=
=4x−{(−2x+2y)−6y}=
=4x−{−2x−4y}=
=6x+4y
h) 3x – { 3x – [3x – (3x –y) – y ] – y} - y
3x – { 3x – [3x – (3x –y) – y ] – y} - y
=3x−{3x−[y−y]−y}−y=
=3x−{3x−[0]−y}−y=
=3x−{3x−y}−y=
=y−y=
=0