Question

1) Escreva oa polinômios na forma reduzida:

a) 4x . ( x - 2xy)

b) - 2m2n . ( mn + 3mn2)

c) ( x + y) . ( 2x2 - y)

d) 2x . ( x3 - y) + 4 . ( x4 + xy)

e) (2a + b) . ( a2 - b)

f) x . ( x2 + y) - 2 . ( x - y) - xy

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Answer 1

Resposta:

a) 4x . ( x - 2xy)

$4 {x}^{2} - 8 {x}^{2} y$

b) - 2m2n . ( mn + 3mn2)

$- 2 {m}^{3} {n}^{2} - 6 {m}^{3} {n}^{3}$

c) ( x + y) . ( 2x2 - y)

$2 {x}^{3} - xy + 2 {x}^{2} y - {y}^{2}$

d) 2x . ( x3 - y) + 4 . ( x4 + xy)

$2 {x}^{4} - 2xy + 4 {x}^{4} + 4xy \\ 6 {x}^{4} + 2xy$

e) (2a + b) . ( a2 - b)

$2 {a}^{3} - 2ab + {a}^{2} b - {b}^{2}$

f) x . ( x2 + y) - 2 . ( x - y) - xy

${x}^{3} + xy - 2x + 2y - xy \\ {x}^{3} - 2x + 2y$