2 Answers

Mital Solanki · Answer 1 · 2021-02-17T09:28:45+0000

Collect like terms

3x^-4×(8x+12x)

=3x^-4 * 20x

=60x^-3

=60 * 1/x^3

$\frac{60}{ x {}^(3) }$

Theotherlight · Answer 2 · 2021-02-19T19:31:27+0000

Answer:

60

x^3

Explanation:

3x^-4 (8x + 12x)

apply exponential rule:

= 3 * 1/x^4 *(8x + 12x)

add similar elements

= 3 * 20 * (1/x^4) x

multiply fractions:

= 1 * 3 * 20x

x^4

simplify:

= 60x

x^4

finally = 60

x^3

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