Question

Efetue as seguintes subtrações:
a) (5x²-4x+7)-(3x²+7x-1)
b) (6x²-6x+9)-(3x²-2y+5)
c) (7x-4y+2)-(2x-2y+5)
d) (4x-y-1)-(9x+y+3)

Answer 1

Resposta:

$5 \times 2 - 4 \times + 7 - 3 \times 2 + 7 \times - 1$

$6 \times 2 - 6 \times + 9 - 3 \times 2 - 2y + 5$