Question

y= (x+3) × ( ×-5) me ajudar pfv

Answer 1

$(x + 3) \times (x - 5)$
$x^{2} - 2x - 15$
a=1 b=-2 c=-15

/\=
${ - 2}^{2} - 4 \times 1 \times ( - 15)$
/\= 4 + 60
/\ = 64
$\sqrt{64 = 8}$
$x^{l} = \frac{2 + 8}{2} = \frac{10}{2} = 5$
${x}^{ll} = \frac{2 - 8}{2} = \frac{ - 6}{2} = - 3$