Question

Quanto é n2 -3n -28?

Answer 1

n2 -3n -2=

2n-3n-28

-1n - 28

-n-28

Answer 2

n²-3n-28

a= 1

b= -3

c= -28

$\frac{-b+-\sqrt{b^{2}-4ac}}{2a}$

$\frac{3+-\sqrt{(-3)^{2}-4.1.(-28)}}{2}$

$\frac{3+-\sqrt{9+112}}{2}$

$\frac{3+-\sqrt{121}}{2}</p><p>[tex] \frac{-3+-{11}}{2}$

[tex] x^{1}= \frac{-3+{11}}{2}
[tex] x^{1}= 4
[tex] x^{2}= \frac{-3-{11}}{2}
[tex] x^{2}= -7
n=(4,-7)