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-BARSIC- [3]
4 years ago
15

On paper, use the completing the square method to solve the equation x^2 + 16x + 2. Can anyone help me with this?

Mathematics
1 answer:
scoray [572]4 years ago
6 0

Answer:

x = -8 ± √62

Step-by-step explanation:

An equation needs an equals sign.  I assume the expression equals zero?

x² + 16x + 2 = 0

To complete the square, start by making the leading coefficient 1 (which it already is).

Next, take half of the b coefficient, square it, and add the result to both sides.

(16/2)² = 8² = 64

x² + 16x + 64 + 2 = 64

Factor the perfect square:

(x + 8)² + 2 = 64

Solve for x:

(x + 8)² = 62

x + 8 = ±√62

x = -8 ± √62

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Y = x² + 5x +4<br><br><br> Factor
mariarad [96]

Answer:

(x + 1)(x + 4)

Step-by-step explanation:

We want to factor x² + 5x +4 into two binomial factors.  Note that 1*4 = 4 and that 1 + 4 = 5, so:

y = x² + 5x +4 = (x + 1)(x + 4)

6 0
3 years ago
Find the vertical, horizontal, and slant asymptotes, if any, for f(x)=5x^3-51x^2+77x+100/x^2-11x+24
liraira [26]

Answer:

Step-by-step explanation:

Given:  f(x)=5x^3-51x^2+77x+100/x^2-11x+24

Please use parentheses to eliminate any ambiguity:

           

      f(x) = (5x^3-51x^2+77x+100) / (x^2 - 11x + 24)

or (better yet):

                  5x^3-51x^2+77x+100

        f(x) = ---------------------------------

                      x^2 - 11x + 24

The vertical asymptotes here are at the zeros of the denominator:

x^2 - 11x + 24 = 0,  This quadratic equation has coefficients a = 1, b = -11 and c = 24.  Thus, its roots (zeros) are:

       -(-11) ± √( 121 - 4(1)(24) )

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

                    2(1)

or:

        11 ± √( 25 )

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

                 2

or:  x = 8 and x = 3

The vertical asymptotes are x = 8 and x = 3.

If we attempt to divide x^2 - 11x + 24 into 5x^3 - 51x^2 + 77x + 100, we see that the first term of the quotient is 5x.  As x increases or decreases without bound, 5x goes to either ∞ or -∞, so we conclude that there is no horiz. asymptote.  Continuing this division results in:

5x + 4 + a fraction

This represents the slant asymptote, y = 5x + 4

7 0
3 years ago
Llus
mafiozo [28]

Answer:

x ≈ 80.4

Step-by-step explanation:

Using the tangent ratio in the right triangle

tan15° = \frac{opposite}{adjacent} = \frac{x}{300} ( multiply both sides by 300 )

300 × tan15° = x , then

x ≈ 80.4 ( to the nearest tenth )

7 0
3 years ago
The quotient of two numbers subtracted from 20
den301095 [7]
Would it be 10-2?=8 quotient means divide 
3 0
4 years ago
What is the length of EF ?
fgiga [73]

Perimeter is the sum of all outside dimensions.

Solve for x first:

12 + x+7 + x+2 + 5 + x +4 + x + 4 = 42

Combine like terms:

4x + 34 = 42

Subtract 34 from both sides:

4x = 8

Divide both sides by 4:

X = 2

Now solve for EF by replacing x:

EF =. X + 7 = 2 + 7 = 9 feet.

4 0
3 years ago
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