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Scorpion4ik [409]
4 years ago
5

How many roots does -2x^2-8=0 have​

Mathematics
1 answer:
Aloiza [94]4 years ago
4 0

Answer: two

Step-by-step explanation:

Factor out the equation:

-2(x^{2} + 4) = 0

-2 cannot equal zero, so that means x^{2}  - 4 will have to equal to zero in order to get zero as a product

x^{2} - 4 = 0

Factor the equation to get:

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

x = 2, x = -2

The equation has two roots

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(09.01)
ratelena [41]

Answer:

y = x2 - 4x + 2 ; y=x²-4

Step-by-step explanation:

Axis of symmetry = - b /2a

y=x²-2

a = 1 ; b = - 2

x = - (-2) / 2(1)

x = 2/2 = 1

y = x2 - 4x + 2

a = 1 ; b = - 4

x = - (-4) / 2(1)

x = 4/2 = 2

y = x2 + 4x + 2

a = 1 ; b = 4

x = - 4 / 2(1)

x = - 4/2 = - 2

y=x²-4

a = 1 ; b = - 4

x = - (-4) / 2(1)

x = 4/2 = 2

6 0
3 years ago
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kipiarov [429]

Answer:

RMT or TMR

Step-by-step explanation:

The angle between the sides is just the angle at which they meet. Since MR and TM meet at M, the resulting angle must include M as well as the ends of the angle, T and R.

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lapo4ka [179]
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3 years ago
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Y_Kistochka [10]

Answer:

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Step-by-step explanation:

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Answer to first one is X = 9
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3 years ago
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