Question

a) 2X . (X + 3X² + Y)

b) (2X + Y) . (X + 3X²)

c) (2X + Y) (2X + Y)

d) (2X – Y) (2X – Y)​

Answer 1

Resposta:

$a) \: 2x \times (x + 3 {x}^{2} + y) \\ 2 {x}^{2} + 6 {x}^{3} + 2xy \\ 6 {x}^{3} + 2 {x}^{2} + 2xy$

$b) \: (2x + y) \times (x + 3 {x}^{2} ) \\ 2 {x}^{2} +6 {x}^{3} + xy + 3 {x}^{2} y \\ 6 {x}^{3} + 2 {x}^{2} + 3 {x}^{2} y + xy$

$c) \: (2x + y) \times (2x + y) \\ 4 {x}^{2} + 2xy + 2xy + {y}^{2} \\ 4 {x}^{2} + 4xy + {y}^{2}$

$d) \: (2x - y) \times (2x - y) \\ 4 {x}^{2} - 2xy - 2xy + {y}^{2} \\ 4 {x}^{2} - 4xy + {y}^{2}$