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astraxan [27]
3 years ago
8

The first three steps of completing the square to solve a quadratic equation x^2+ 8x+0=0are shown below What are the next three

steps
Mathematics
1 answer:
Setler [38]3 years ago
8 0

Step-by-step explanation:

x^2 + 8x + 0 = 0

Completing the square just means getting yourself a perfect square trinomial on the left side of your equation. It makes factoring easier for you. The steps are like this:

x² + 8x + 0 = 0 ... take the middle coefficient, 8, divide it by 2, and square it. Same process every time. Divide middle by two, square it. This gives you the "perfect square" of your equation. In this case, 8/2 = 4, and 4² = 16. So what you do is add 16 to BOTH sides of the equation.

x² + 8x + 16 = 16 ... factor the left side

(x + 4)(x + 4) = 16 ... notice that your two factors on the left are identical

(x + 4)² = 16 ... now we want to solve for x. Start by taking the square root of both sides

x + 4 = √16 ... √16 can give us two results: -4 and 4. So solve for both.

x + 4 = 4         x + 4 = -4  ... solve for x

x = 0,              x = -8

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No. This is because the two smaller lengths must be greater than the largest length (7+3=10) this is less than 13 meaning the triangle won’t work
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Which equation shows the point-slope form of the line that passes through (3, 2) and has a slope of 1/3
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3 0
2 years ago
Please, I really need help-
posledela
<h3>Answer: 48</h3>

=====================================================

Explanation:

Triangle ABC is isosceles because AC = BC.

The angles opposite these congruent sides are angle ABC and angle BAC. These are the base angles.

For any isosceles triangle, the base angles are congruent.

Angle BAC = 69 degrees is given. So angle ABC = 69 as well.

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

The missing angle must add to the two other angles so that all three angles in a triangle add to 180

(angle ABC) + (angle BAC) + (angle BCA) = 180

69 + 69 + (angle BCA) = 180

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angle BCA = 180-138

angle BCA = 42

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

Angle DCE is congruent to angle BCA because they are vertical angles.

Triangle DCE is a right triangle. The missing angle is 90-(angle BCA) = 90-42 = 48

angle EDC = 48 degrees

6 0
3 years ago
Read 2 more answers
PLEASE ANSWER ASAPPPP I WILL GIVE BRAINLY!!!!!!!!!!!
Crank

Answer:

-\frac{7}{8}(-\frac{8}{7})x-\frac{3}{4}=20\left(-\frac{8}{7}\right)

the last one

6 0
3 years ago
Read 2 more answers
Simplify – 2(7x – 3)
ANTONII [103]

All you need to do here is multiply the outside number by both 7x and -3.

When done correctly it should look like this:

-14x+6

Thats the answer.

7 times 2 gives you 14 but when multiplying mixed signs it turns negative so it would be -14.

negative 3 times negative 2 gives you 6. Both signs are negative, and you would suppose it would turn into a negative but thats only true when both signs are mixed. Both the 3 and the 2 are negative, making the signs the samez giving you positive

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