Question

Socorrooooooooooooooooooooooooooooo

Answer 1

H)

$ab + c = 2.1 + 3 = 2 + 3 = 5$

I)

$xy + 3x = 3.2 + 3.3 = 6 + 9 = 15$

J)

$abc + 2a = 5.2.3 + 2.5 = 30 + 10 = 40$

K)

${a}^{3} + 5b {}^{2} = {2}^{3} + 5.5 = 8 + 25 = 33$

L)

${b}^{2} - 4ac = {( - 3)}^{2} - 4.5.2 = 9 - 40 = - 31$

M)

${m}^{3} - 3m = {2}^{3} - 3.2 = 8 - 6 = 2$

N)

$\frac{ {a}^{2} + b {}^{2} }{c {}^{2} } = \frac{ {( - 3) {}^{2} + ( - 5)}^{2} }{( - 2) {}^{2} } = \frac{9 + 25}{4} = \frac{34}{4}$

Simplificando fica:

$\frac{34}{4} \div 2 = \frac{17}{2}$

Espero ter ajudado!