All categories

3 years ago

What is the discriminant of 4n^2 - 7n +2 = 0?

Mathematics

1 answer:

Marina86 [1]3 years ago

3 0

The discriminant is 2

You might be interested in

Rotate a semicircle around a line through the endpoints of the semicircle.

trapecia [35]

I think its a sphere

3 0

2 years ago

Aaron needs a total of $410 to buy a new bicycle. He has $35 saved. He earns $15 each week delivering newspapers. How many weeks

Ostrovityanka [42]

35+15x=410
410-35=375
375/15=25
He will need to work 25 weeks.

3 0

3 years ago

How do you solve this problem?

nata0808 [166]

Answer:

Step-by-step explanation:

It can't be 102. If that happened 51 would be printer and you would never have gotten out of 51. It would keep on printing 51.

For the reason just given, 51 was not the starting point. It would just keep on printing 51.

D is obviously wrong because A and B are wrong.

The answer is C

204 is even. It will be divided by 2

102 is then printed out.

8 0

2 years ago

5. Find the discriminant of 15x2 = 4x – 1 and describe

diamong [38]

Answer:

a) The discriminant of the equation = - 44

b)The nature of the roots will be imaginary.

c) $x = \frac{2 +\sqrt{11} i}{15} or, x = \frac{2 - \sqrt{11} i}{15}$

Step-by-step explanation:

Here, the given expression is $15x^{2} = 4x -1$

or, $15x^{2} - 4x + 1 = 0$

Now the discriminant (D) of a quadratic equation $ax^{2} +b x + c = 0$

D = $b^{2} - 4ac = (-4)^{2} - 4(15) (1) = 16 - (60) = -44$

Hence, the discriminant of the equation = - 44

As D< 0, so the roots will be imaginary.

Now,by quadratic formula : $x = \frac{-b \pm \sqrt{b^{2} - 4ac} }{2a}$

So, here $x = \frac{-(-4) \pm \sqrt{D} }{2a} = \frac{4 \pm \sqrt{(-44 )} }{30}$

So, either $x = \frac{4 + \sqrt{(-44 )} }{30} or, x = \frac{4 - \sqrt{(-44 )} }{30}$

or, $x = \frac{2 +\sqrt{11} i}{15} or, x = \frac{2 - \sqrt{11} i}{15}$

8 0

2 years ago

Choose a counterexample that proves that the conjecture below is false.. abc is a right triangle, so angle A measures 90 degrees

andre [41]

Choose a counterexample that proves that the conjecture below is false.. abc is a right triangle, so angle A measures 90 degrees.

Answer: Out of all the options shown above the one that represents the counterexample that proves that the conjecture presented above is false is answer choice 2. Angle b is 90 degrees. The reason being that in a right angle there is only one angle that measures 90 degrees.

I hope it helps, Regards.

6 0

3 years ago

Read 2 more answers