Question

ayudemen porfavor si esque tengo que entregarlo​

Answer 1

Explicación paso a paso:

1).

$5x {}^{2} y - 3xy {}^{2} = 5( - 2) {}^{2} (3) - 3( - 2)(3) \\ = 5(4)(3) - 3( - 6) \\ = 5(12) + 18 \\ = 60 + 18 \\ = 78$

2).

$\frac{2}{3} x {}^{3} y {}^{2}z - 4x {}^{2} y {}^{3} z {}^{2} + 25z \\ = \frac{2}{3} ( - 2) {}^{3}(3) {}^{2} (4) - 4( - 2) {}^{2}(3) {}^{3} (4) {}^{2} + 25(4) \\ = \frac{2}{3} ( - 8)(9)(4) - 4(4)(27)(16) + 100 \\ = \frac{2}{3} - 288 - 6.912 + 100 \\ = \frac{21298}{3}$

3).