2 years ago

HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP

Mathematics

1 answer:

Pachacha [2.7K]2 years ago

6 0

Answer:

I am not 100% sure but i think it is A.

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What is the discriminant of the quadratic equation 2x² - x - 3=0?

Tamiku [17]

The given quadratic equation is

$2 {x}^{2} - x - 3 = 0$

comparing with

${ax}^{2} + bx + c = 0$

We get ,

$a = 2 \\ b = - 1 \\ c = - 3$

formula :

$D = {b}^{2} - 4ac \\ \\ D = {( - 1)}^{2} - 4 \times 2 \times ( - 3) \\ \\ D = 1 - ( - 24) \\ \\D = 1 + 24 \\ \\D = 25.$

Discriminant of given quadratic equation is 25 .

option (B) 25 ✔

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If a convex polyhedron has 12 edges and 8 faces, then how many vertices does it have?

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3 years ago

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andrew-mc [135]

Tan t= 8/15
cot t= 15/8
csc t=-17/8
use sohcahtoa and the reciprocals

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2 years ago