Operações com expressões algébricas

 1) Efetue as seguintes adições :




a) (2x²-9x+2)+(3x²+7x-1) _______ (R:5x² -2x + 1)


b) (5x²+5x-8)+(-2x²+3x-2) ______ (R:3x² + 8x - 10)


c) (3x-6y+4)+(4x+2y-2) ________ (R:7x -4y +2)

d) (5x²-7x+2)+(2x²+7x-1) _______ (R:7x²+ 1)

e) (4x+3y+1)+(6x-2y-9) _________ (R:10x +1y-8)

f) (2x³+5x²+4x)+(2x³-3x²+x) _____ (R:4x³ +2x²+ 5x)

g) (5x²-2ax+a²)+(-3x²+2ax-a²) ____ (R: 2x²)

h) (y²+3y-5)+(-3y+7-5y²) ________ (R: -4y² + 2)

i) (x²-5x+3)+(-4x²-2x) __________ (R:-3x² - 7x + 3)

j) (9x²-4x-3)+(3x²-10) __________ (R:12x² -4x- 13)






Vamos calcular:



(5x²-4x+9)-(8x²-6x+3)=

=5x²-4x+9-8x²+6x-3=

=5x²-8x²-4x+6x+9-3=

=-3x²+2x+6



EXERCICIOS



1) Efetue as seguintes subtrações:

a) (5x²-4x+7)-(3x²+7x-1) _____ (R: 2x² - 11x + 8)

b) (6x²-6x+9)-(3x²+8x-2) _____ (R: 3x² - 14x + 11)


c) (7x-4y+2)-(2x-2y+5) _______ (R: 5x - 2y – 3)

d) (4x-y-1)-(9x+y+3) _________ (R: -5x – 2y – 4)

e) (-2a²-3ª+6)-(-4a²-5ª+6) _____ ( R: -2a² +2a)

f) (4x³-6x²+3x)-(7x³-6x²+8x) ___ (R: -3x³ - 5x)

g) (x²-5x+3)-(4x²+6) _________ (R: -3x² -5x -3)


h) (x²+2xy+y²)-(y²+x²+2xy) ____ (R: 0)

i) (7ab+4c-3a)-(5c+4a-10) ______ (R: 7ab -c-7a + 10)