Qual o resultado de : (5x² - 4x + 2) + (2x² - 3x + 6) *
2 pontos
a)10x² + 7x + 8
b)7x² - 7x + 8
c)8x² - 7x + 8
d)8x² - 7x + 7
Soluções para a tarefa
Resposta:
a) (5x²-4x+7)-(3x²+7x-1)=
5x²-4x+7-3x²-7x+1=
5x²-3x²-4x-7x+7+1=
2x²-11x+8
b) (6x²-6x+9)-(3x²+8x-2)=
6x²-6x+9-3x²-8x+2=
6x²-3x²-6x-8x+9+2=
3x²-14x+11
c) (7x-4y+2)-(2x-2y+5)=
7x-4y+2-2x+2y-5=
7x-2x-4y+2y+2-5=
5x-2y-3
d) (4x-y-1)-(9x+y+3)=
4x-y-1-9x-y-3=
4x-9x-y-y-1-3=
-5x-2y-4
e) (-2a²-3ª+6)-(-4a²-5ª+6)=
-2a²-3a+6+4a²+5a-6=
-2a²+4a²-3a+5a+6-6=
2a²+2a
f) (4x³-6x²+3x)-(7x³-6x²+8x)=
4x³-6x²+3x-7x³+6x²-8x=
4x³-7x³-6x²+6x²+3x-8x=
-3x³-5x
g) (x²-5x+3)-(4x²+6)=
x²-5x+3-4x²-6=
x²-4x²-5x+3-6=
-3x²-5x-3
h) (x²+2xy+y²)-(y²+x²+2xy)=
x²+2xy+y²-y²-x²-2xy=
x²-x²+2xy-2xy+y²-y²=
0
i) (7ab+4c-3a)-(5c+4a-10)=
7ab+4c-3a-5c-4a+10=
7ab+4c-5c-3a-4a+10=
7ab-c-7a+10
espero ter ajudado vc