Question

resuelve las siguientes operaciones​

Answer 1

a. -20x³+27x-27

b. 4x³-3x-13

c. -8a3b+36ab/3+148×⁴+28x³+24x²+44x-140

d. 8×⁴+28x³+24x²+44x-140

e. 15m³n+20m²n²+9m+12n

a. (-8x³+12x-20)-(12x³-15x+7)

= -8x³+12×-20-(12x³-15x+7)

=-8x³+12×-20-12x³-15x+7

=-20׳+27×-27

b. (-8x³+12x-20)+(12x³-15x+7)

=-8x³+12x-20+12x³-15x+7

=-8x³+12x³+12x-15x-20+7

=4x³+12x-15x-20+7

=4x³-3x-20+7

=4x³-3x-13

c. (-2a³b+12ab-1)-(2/3a³b-15)

= -2a³b+12ab-1-(2/3a³b-15)

=-2a³b+12ab-1-(2a³b/3 -15)

=-2a³b+12ab-1-2a³b/3 +15

=-8a3b+36ab/3+14

d. (4x³12x-20).(2x+7)

=4x³.2x+4x³.7+12x.2x+12×.7+(-20).2×+(-20).7

=4.2x³x+4.7x³+12.2xx+12.7x-20.2x-20.7

=8×⁴+28x³+24x²+44x-140

e. (5m²n+3).(3m+4n)

=5m²n.3m+5m²n.4n+3.3m+3.4n

=5.3m³mn+5.4m²nn+3.3m+3.4n

=15m³n+20m²n²+9m+12n

ya le ayudo lo demás si