3 years ago

Solve and explain steps, please 4x³ + 12x² - 9x - 27 = 0

Mathematics

1 answer:

alekssr [168]3 years ago

7 0

4x^3 + 12x^2 - 9x - 27 = 0

x^2 (x + 3) - 9 (x + 3) = 0

(square root x^2 - square root 9) (x +3) = 0

x = -3; x = -3

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3 years ago

A line passes through the point (4,8) and has a slope of 3/2. Write an equation in slope-intercept form this line.

Tcecarenko [31]

Answer:

3x-2y=-4 is the equation of the slope intercept line.

Step-by-step explanation:

The passing through point (4,8)=(x1,y1)

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the equation is

or (y-y1)=m(x-x1)

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3 years ago

HELP HELP HELP Quick algebra 1 questions

beks73 [17]

Hello:

Okay, this problem should be taken in a series of steps:

What is the slope's formula?

$\rm\hookrightarrow \frac{y_2-y_1}{x_2-x_1}$

(x₁,y₁) -- first point
(x₂,y₂) -- second point

Okay, now let's use this knowledge

10. (5,-19) and (-5,21)

$Slope = \frac{21--19}{-5-5} =\frac{40}{-10}=-4$

11. (12,1) and (12, -1)

$Slope = \frac{-1-1}{12-12} =\frac{-2}{0}$

12. (8,7) and (4,7)

$Slope = \frac{7-7}{4-7} =0$

Answer:

Question 10: -4
Question 11: undefined
Question 12: 0

Hopefully that helps!

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2 years ago