Question

alguien que me ayude solo pique la imagen para verlo todo​

Answer 1

Respuesta:

$a)5 {x}^{2} - 2x = 5 \times {3}^{2} - 2 \times 3 = 5 \times 27 - 2 \times 3 = 135 - 6 = 129$

$b) \frac{3}{2} {x}^{2} - 4x = \frac{3}{2} \times {( - 2)}^{2} - 4 \times ( - 2) = \frac{3}{2} \times 4 - ( - 8) = 6 - ( - 8) = 6 + 8 = 14$

$c) \frac{1}{5} {x}^{2} - 5x = \frac{1}{5} \times {4}^{2} - 5 \times 4 = \frac{1}{5} \times 16 - 5 \times 4 = \frac{16}{5} - 20 = \frac{16}{5} - \frac{100}{5} = - \frac{84}{5}$

$d)6 {x}^{2} - x = 6 \times {( - 7)}^{2} - ( - 7) = 6 \times 49 - ( - 7) = 294 + 7 = 301$