All categories

3 years ago

Select all that apply. If 2x²-6x=0, then

Mathematics

1 answer:

Paul [167]3 years ago

3 0

Answer: x=0,3 . . . . . .

You might be interested in

Who knows the answer plzz help

raketka [301]

Answer:

x = -3 + $\frac{5\sqrt{2} }{2}$ , -3 - $\frac{5\sqrt{2} }{2}$

Step-by-step explanation:

Step 1: Isolate <em>x</em>'s

2x² + 12x = 7

Step 2: Factor

2(x² + 6x) = 7

x² + 6x = 7/2

Step 3: Complete the Square

x² + 6x + 9 = 7/2 + 9

(x + 3)² = 25/2

Step 4: Solve for <em>x</em>

√(x + 3)² = √25/2

x + 3 = 5√2/2

x = -3 ± 5√2/2

6 0

3 years ago

Find all solutions to the equation. -\dfrac{2}{x(x+2)}=\dfrac{x+3}{x+2}− x(x+2) 2 = x+2 x+3 minus, start fraction, 2, divide

Gnoma [55]

Answer:

$x=-1$

Step-by-step explanation:

We have been given an equation $\frac{-2}{x(x+2)}=\frac{x+3}{x+2}$ . We are asked to find the solutions of our given equation.

First of all, we will cross multiply our given equation as:

$-2(x+2)=x(x+2)(x+3)$

Subtract $x(x+2)(x+3)$ from both sides:

$-2(x+2)-x(x+2)(x+3)=x(x+2)(x+3)-x(x+2)(x+3)$

$-2(x+2)-x(x+2)(x+3)=0$

Now we will factor out $(x+2)$ .

$(x+2)(-2-x(x+3))=0$

$(x+2)(-2-x^2-3x)=0$

$(x+2)(-(x^2+3x+2))=0$

Now we will factor by splitting the middle term.

$-(x+2)(x^2+2x+x+2)=0$

$-(x+2)(x+2)(x+1)=0$

$-(x+2)^2(x+1)=0$

Now we will use zero product property and solve for x as:

$-(x+2)^2=0,(x+1)=0$

$(x+2)=0,(x+1)=0$

$x=-2,x=-1$

Now, we will check for extraneous solutions.

We can see that $x=-2$ will make both denominators zero because our function is not defined at $x=-2$ .

Therefore, the solution for our given equation is $x=-1$ .

7 0

4 years ago

Read 2 more answers

Henry wants some of his

Morgarella [4.7K]

Answer:

maybe 14 or 15 im not good with this stuff im in 8th grade and im very very behind a lot im prob gonna delete this app cuz I dont understand anything

3 0

3 years ago

<img src="https://tex.z-dn.net/?f=3%5Csqrt%7B2%7D%20-%205%20%5Csqrt%7B18%7D" id="TexFormula1" title="3\sqrt{2} - 5 \sqrt{18}" al

Gennadij [26K]

Here is the answer, I couldn’t type it out so I took a picture of it, if you need the steps please let me know

6 0

4 years ago

Can someone please help find the value of x? i didn’t do it right :(

slava [35]

Answer:

Step-by-step explanation:

cos(20°) = (14/2)/x

x = 7/cos(20°) ≈ 7.45

5 0

3 years ago