Question

URGENT, ex.3, dau coronita!

Answer 1

(scriu doar răspunsul)
a) =
$2 {x}^{2} - 3x + 10x - 15 = 2 {x}^{2} + 7x - 15$
b) =
${x}^{2} + 2x - 3x - 6 = {x}^{2} - x - 6$
c) =
$12 \times - 6 {x}^{2} - 4 + 2x = 14 \times - 6 {x}^{2} - 4 = - 6 {x}^{2} + 14x - 4$
d) =
$2 {x}^{2} - 5x + 8x - 20 + 2 {x}^{2} + 2x + 3x + 3 - 4 {x}^{2} - 8 \times = 0 + 0 - 17 = - 17$