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Savatey [412]
2 years ago
8

This is confusing someone help please

Mathematics
1 answer:
Marat540 [252]2 years ago
4 0

Answer:

Below in BOLD.

Step-by-step explanation:

5x^2 - 6x - 2 = 0

Quadratic formula for ax^2 + bx + c = 0  is

x =  [-b ± √(b^2 - 4ac)]/ 2a    

Here we have a = 5, b = -6 and c = -2

so x =  [-(-6)  ± √((-6)^2 - 4*5*-2)]/ 2*5

=  [ 6 ± √(36 + 40)] / 10

= 0.6 ±  √76 / 10

= 0.6 ±  0.8718

= 1.4718,  -0.2718

= 1.5, -0.3 to one decimal place.

x^2 + 3x = 40

x^2 + 3x - 40 = 0

We can factor this one:

(x - 5)(x + 8) = 0

x - 5 = 0 giving x = 5 and

x + 8 = 0 giving x = -8.

Answer  x = -8, 5.

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Answer:

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3 years ago
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6 0
3 years ago
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6 0
3 years ago
Read 2 more answers
Set of data with 350,000 numbers is normally
Rudiy27

Step-by-step explanation:

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7 0
1 year ago
the mass of jam when full is 450g. the jam has a mass of 80g. find the total mass of 3 full jars of jam in kilograms and grams​
anastassius [24]

Answer:

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Step-by-step explanation:

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