2 years ago

-k / 3 = 9 = ? ? ? ty

Mathematics

1 answer:

Mekhanik [1.2K]2 years ago

8 0

Answer:

the answer for -k/3=9 is K= -27

Step-by-step explanation:

hope this helps. if you want the steps let me and i will put it their

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Find the zeros of the function f(x)=2x^2-7x-30

ivanzaharov [21]

$2x^2-7x-30=0 \\ \\
a=2 \\ b=-7 \\ c=-30 \\
b^2-4ac=(-7)^2-4 \times 2 \times (-30)=49+240=289 \\ \\
x=\frac{-b \pm \sqrt{b^2-4ac}}{2a}=\frac{-(-7) \pm \sqrt{289}}{2 \times 2}=\frac{7 \pm 17}{4} \\
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\boxed{x=-2.5 \hbox{ or } x=6}$