Question

b) (3y)-(-5y) - 2y =

d) (x + 1)(x+2) =

c) 3x³y² (7x²y)=

e) (5x-2)-(4x + 3) =

d) (xy)=

f) 4xy(x² + 3xy + 1) =

e) (xy²2) (xyz')' =

Answer 1

B)

$(3y) - (5y) - 2y = \\ \\ 3y - 5y - 2y \\ \\ - 4y$

D)

$(x + 1)(x + 2) \\ \\ x \times x + 2x + x + 2 \\ \\ {x}^{2} + 2x + x + 2 \\ \\ {x}^{2} + 3x + 2$

C)

$3 {x}^{3} {y}^{3} \times (7 {x}^{2} y) \\ \\ 3 {x}^{3} {y}^{3} \times 7 {x}^{2} y \\ \\ 21 {x}^{5} {y}^{4}$

E)

$(5x - 2) - (4x + 3) \\ \\ 5x - 2 - 4x - 3 \\ \\ x = - 5$

D) não tem como calcular

F)

$4xy \times ( {x}^{2} + 3xy + 1) \\ \\ 4xy {x}^{2} + 4xy \times 3xy + 4xy \\ \\ 4 {x}^{3} y + 12 {x}^{2} {y}^{2} + 4xy$

E)

$(x {y}^{2} \times 2) \times (xy {z}^{1} {)}^{1} \\ \\ (2x {y}^{2} )xy {z}^{1} \\ \\ 2x {y}^{2} xy {z}^{1} \\ \\ 2 {x}^{2} {y}^{3} z$