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4 years ago

Solve 2x2 – 3x + 6 = 0.

Mathematics

1 answer:

artcher [175]4 years ago

3 0

Answer:

3 ±i√39

------------

Step-by-step explanation:

The coefficients of this quadratic equation are a = 2, b = -3 and c = 6. Thus, the discriminant is b^2 - 4(a)(c), or (-3)^2 - 4(2)(6), or 9 - 48, or -39.

Thus, the roots are:

-(-3) ± i√39 3 ±i√39

x = ------------------- = ----------------

2(2) 4

This corresponds to the first of the four given answers.

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Pie

Answer:

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3 years ago

Which of the following values "completes the square," or creates a perfect square trinomial, for x2 + 6x + ___?

jekas [21]

To create a perfect square trinomial, halve the x coefficient, square it, and then add that value.

In the case of x² + 6x, we would have 6 to get 3, then square 3 to get 9.
We would add 9 to make a perfect square trinomial.
<u>
</u><u>Why this works</u>
A perfect square trinomial is designed to factor to some value (x+n)².
When you FOIL this you get x² + 2nx + n².
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3 years ago

Please help! Two math problems!!!

Fynjy0 [20]

Answer:

Tell me if i am wrong. :)

Step-by-step explanation:

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y = -1 - 2x

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3 0

4 years ago

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ra1l [238]

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5 0

4 years ago

A track has the shapes shown. what is the perimeter ?

USPshnik [31]

Break this problem down first. You have two lines each with length of 5. You also have two halves of a circle, combine them to get a full circle with a radius of 2. The formula to find the perimeter of a circle is
$2\pi \times r$
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4 0

3 years ago