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2 years ago

How to solve quadratic equations

Mathematics

1 answer:

eduard2 years ago

8 0

If we have two numbers A&B and we know that A times B=0 then it must follow that either A=0, or B=0 (or both)

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I have no idea how to slove this 5x-5 =2×+97

galina1969 [7]

Answer: x=34

Step-by-step explanation:

1. You subtract 2x from 5x on the other side to get rid of the 2x leaving you with 3x.

2. Then you add 5 to 97 to get rid of the -5, giving you 102 on the opposite side.

3. divide 102 by 3x giving you 34.

5x-5=2x+97

-2x -2x

3x-5=97 X=102

+5 +5

3x=102

x/3 102/3

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3 years ago

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Find GK Help plz...No links!! I will report

wariber [46]

Answer:

GK = 20

Step-by-step explanation:

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2 years ago

Which of the following provides an object with rotational symmetry?

Nookie1986 [14]

Answer: Choice C) Star shaped symbol

We can rotate the star symbol 90 degrees to have it line up with its original image. The before and after images would be identical after doing such a rotation. So this figure has rotational symmetry.

The other figures would change if we rotated them some angle x such that $0 < x < 360$ , so they do not have rotational symmetry.

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3 years ago

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Solve 2x^2 + x - 4 = 0 X2 +

damaskus [11]

Answer:

$\large \boxed{\sf \ \ x = -\dfrac{\sqrt{33}+1}{4} \ \ or \ \ x = \dfrac{\sqrt{33}-1}{4} \ \ }$

Step-by-step explanation:

Hello, please find below my work.

$2x^2+x-4=0\\\\\text{*** divide by 2 both sides ***}\\\\x^2+\dfrac{1}{2}x-2=0\\\\\text{*** complete the square ***}\\\\x^2+\dfrac{1}{2}x-2=(x+\dfrac{1}{4})^2-\dfrac{1^2}{4^2}-2=0\\\\\text{*** simplify ***}\\\\(x+\dfrac{1}{4})^2-\dfrac{1+16*2}{16}=(x+\dfrac{1}{4})^2-\dfrac{33}{16}=0$

$\text{*** add } \dfrac{33}{16} \text{ to both sides ***}\\\\(x+\dfrac{1}{4})^2=\dfrac{33}{16}\\\\\text{**** take the root ***}\\\\x+\dfrac{1}{4}=\pm \dfrac{\sqrt{33}}{4}\\\\\text{*** subtract } \dfrac{1}{4} \text{ from both sides ***}\\\\x = -\dfrac{1}{4} -\dfrac{\sqrt{33}}{4} \ \ or \ \ x = -\dfrac{1}{4} +\dfrac{\sqrt{33}}{4}$

Hope this helps.

Do not hesitate if you need further explanation.

Thank you

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3 years ago

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Radda [10]

Answer:

Explanation:

Since the distance from the school to the bank is 4 units, then the library would be 4 units always from the school!

How to solve: Look at the answer choices and see which one is 4 units away.

Answer: B, (2,8)

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2 years ago

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