Question

plz answer this questions plz plz plz answer plz plz plz​​

Answer 1

Step-by-step explanation:

1)

$16 + 4 - 2k - 2 = 0$

$k = 9$

2)3

$\alpha + \beta = \frac{ - b}{a}$

$2 \beta = \frac{ - b}{a}$

3)1

4)

${2}^{2} + 3(2) + k = 0$

$k = - 10$

5)1

(x-4)(x+3)

6)2

7)

${x}^{2} + 5x + 2x + 10 = (x + 2)(x + 5)$