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Tanya [424]
4 years ago
11

4X²+ 3x² - 6x + 8

Mathematics
1 answer:
tatyana61 [14]4 years ago
3 0

Answer:

Below.

Step-by-step explanation:

4X²+ 3x² - 6x + 8

Part A.

If x+3 is a factor then f(-3) = 0.

f(-3) = 4(-3)^3 + 3(-3)^2 - 6(-3) + 8

= -108 + 27 + 18 + 8

= -55

So x+3 is NOT a factor.

Part B.

We worked this out in Part A:

-55.

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Answer:

The equation of line 3 is;

y = \frac{2}{3} x + 6

Step-by-step explanation:

Line 1 passes through the points A(-15,-8) andn B(-3,0)

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Line 3 is parallel to line 1 and has the same y-intercept as line 2.

We are to determine the equation of line 3.

<u>Equation of line 1:</u>

<u />

Slope = change in y-axis ÷ change in x-axis

The slope of line 1 = \frac{0 - -8}{-3 - -15}  = \frac{8}{12} = \frac{2}{3}

Picking another point (x,y) on the line;

Slope = \frac{y - 0}{x - -3}  = \frac{2}{3}

y = \frac{2}{3} x + 2 (this is the equation of line 1)

<u>Equation of line 2:</u>

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We put the equation given, of line 2, in the cartesian plane format;

3y = 5x + 18

y = \frac{5}{3} x + 6

Finally, the equation of line 2 is;

y = 1\frac{2}{3} x + 6

<u>Equation of line 3:</u>

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Given: Line 3 is parallel to line 1

The slopes of two parallel lines are the same so line 3 has a slope of \frac{2}{3}

Given: Line 3 has the same y-intercept as line 2

The y-intecept of line 2 is 6 (y-intercept is the value of y when x = 0)

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