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andrezito [222]
3 years ago
11

Giải pt x^{2} +X-1=0

Mathematics
1 answer:
faust18 [17]3 years ago
6 0

Answer:

x1 = \frac{-1 + \sqrt{5} }{2} ; x2 = \frac{-1 - \sqrt{5} }{2}

Step-by-step explanation:

Người Việt Nam à em :v

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The left and right page numbers on an
liubo4ka [24]
The pages would be 166 and 167
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HELP PLEASSEEE IT REALLY URGENT!!!!<br><br> PLEASE ONLY ANSWER IF YOU ARE CONFIDENT!
Dmitry [639]

Answer:

B. 12.5 feet below the surface of the water

Step-by-step explanation:

-20 + (-32.5) + 40

40 - 52.5

= -12.5 feet

= 12.5 feet below the water

6 0
3 years ago
1) Find the x-coordinate of the vertex, y-coordinate of the vertex, and the z-
Afina-wow [57]

Answer:

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Step-by-step explanation:

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4 0
3 years ago
Which equation represents the line that passes through (–6, 7) and (–3, 6)?
Softa [21]

Answer:

The equation that represents the line that passes through (-6,7) and (-3,6) is: y = -1/3x + 5

Step-by-step explanation:

The equation of line for point=slope form is

y-y₁ = m(x-x₁)

Finding Slope m:

m= y₂-y₁/x₂-x₁

here y₂= 6,y₁= 7,x₂= -3,x₁= -6

m = 6-7/-3-(-6)

m = -1/-3+6

m = -1/3

The slope m = -1/3 and considering point (-6,7) the equation is:

y-y₁ = m(x-x₁)

y-7 = (-1/3)(x-(-6))

y-7 = -1/3(x+6)

y-7 = -1/3x -2

y = -1/3x-2+7

y = -1/3x + 5

So, the equation that represents the line that passes through (-6,7) and (-3,6) is: y = -1/3x + 5

5 0
3 years ago
Simplify the following:
Ket [755]

Answer:

For the first question:

\sqrt{\frac{15x}{x^3}}\\= \sqrt{\frac{15}{x^2}}\\= \frac{\sqrt{15}}{x}\\

And the second

\frac{\sqrt{x^2}}{\sqrt{x^3}}\\= (x^2)^{\frac{1}{2} }(x^3)^{\frac{-1}{2} }\\= x^1 \times x^{\frac{-3}{2} }\\= x^{\frac{2}{2}} \times x^{\frac{-3}{2} }\\= x^{-\frac{1}{2}}\\= \frac{1}{\sqrt{x}}

5 0
3 years ago
Read 2 more answers
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