Question

Efetue as multiplicações de monômios:
A) 7X x 3X =
B) 6X⁵ x 8X =
C) (-3X²Y³) x (+6X⁴Y⁸) =
D) (-4X⁸) x (-9X⁹) =
E) (-5X³Y²) x (+8XY³) =
F) (-20X⁸Y²) x (-5X³Y⁴) =
G) (-7X³) x (-8X⁹) =
H) (-4X⁸⁰) x (+5X²⁰) =​

Answer 1

Resposta:

$a)7x \times 3x = 7 \times 3 \times {x}^{1 + 1} = 21 {x}^{2}$

$b)6 {x}^{5} \times 8x = 6 \times 8 \times {x}^{5 + 1} = 48 {x}^{6}$

$c)( - 3 {x}^{2} {y}^{3} ) \times (6 {x}^{4} {y}^{8} )$

$( - 3) \times 6 \times {x}^{2 + 4} \times {y}^{3 + 8} = - 18 {x}^{6} {y}^{11}$

$d)( - 4 {x}^{8} ) \times ( - 9 {x}^{9} )$

$( - 4) \times ( - 9) \times {x}^{8 + 9} = 36 {x}^{17}$

$e)( - 5 {x}^{3} {y}^{2} ) \times (8x {y}^{3} )$

$( - 5) \times 8 \times {x}^{3 + 1} \times {y}^{2 + 3} = - 40 {x}^{4} {y}^{5}$

$f)( - 20 {x}^{8} {y}^{2} ) \times ( - 5 {x}^{3} {y}^{4})$

$( - 20) \times ( - 5) \times {x}^{8 + 3} \times {y}^{2 + 4} = 100 {x}^{11} {y}^{6}$

$g)( - 7 {x}^{3} ) \times ( - 8 {x}^{9} )$

$( - 7) \times ( - 8) \times {x}^{3 + 9} = 56 {x}^{12}$

$h)( - 4 {x}^{80} ) \times (5 {x}^{20} )$

$( - 4) \times 5 \times {x}^{80 + 20} = - 20 {x}^{100}$

Espero ter te ajudado.