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guapka [62]
3 years ago
8

Find the discriminant, and determine the number of real solutions. then solve 2x^2+3x-9=0

Mathematics
1 answer:
LekaFEV [45]3 years ago
7 0
Discriminant = 
b² - 4ac

3² - 4(2)(- 9)
9 + 72
81

Your equation has two real solutions.

2x² + 3x - 9 = 0
2x² + 6x - 3x - 9 = 0
2x(x + 3) - 3(x + 3) = 0

(2x - 3)(x + 3) = 0

Set each equal to zero:

2x - 3 = 0
2x = 3
x = 3/2

x + 3 = 0
x = - 3

Your two solutions are x = - 3, 3/2
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3 years ago
Help me please due in 20 minutes
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Step-by-step explanation:

4 0
2 years ago
Subtract. –5.8 – (–8.4) A. –14.2 B. –2.6 C. 2.6 D. 14.2
svp [43]
-5.8 - (-8.4)

When we multiply two negatives they become a positive. In this situation, where there is no other number, you can assume there's basically a 1 in that place. 

-5.8 - 1(-8.4) would be just as correct. (If this helps visually clarify anything.)

So we take that -1 and multiply it by that -8.4. Multiplying 1 against anything leaves it the same, so we just need to change the sign. Two negatives make a positive. 

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Now we add these together.

This gives us our final answer of 2.6
6 0
3 years ago
Read 2 more answers
What is the volume of a cylinder with base radius 333 and height 888?
ozzi

Answer:

V≈3.09×108

Step-by-step explanation:

Shape: Cylinder

Solved for volume

Radius: 333

Height: 888

Formula: Radius, Height

Exact answer: V≈3.09×108

<u><em>Hope this helps.</em></u>

4 0
3 years ago
PLEASE HELP
rusak2 [61]
C' ( 4, -2 )

this is the explanation sort of

c ( -2, -3 ), since it is translated six units to the right, add 6 to the x-coordinate and since it is translated one unit up, add 1 to the y-coordinate
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