Question

6) Determine os produtos.
a) x7.x8
b) (+3x). (- 8x)
c) (- 2x²y). (+ 7xy)
d) (+ 4ab2).(- 2abc)​

Answer 1

$a) \: \: {x}^{7} \times {x}^{8} = \\ {x}^{7 + 8} = \\ {x}^{15}$

$b) \: \: ( + 3x) \times ( - 8x) = \\ - 24 {x}^{2}$

$c) \: \: ( - 2 {x}^{2} y) \times (7xy) \\ - 14 {x}^{3} {y}^{2}$

$d) \: \: ( + 4ab {}^{2} ) \times ( - 2abc) = \\ - 8a {}^{2} {b}^{3} c$