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4 years ago

13

8x^2-2x-3=0 find the solution

1 answer:

vivado [14]4 years ago

5 0

Factor using ac method

mulitply 8 and -3
-24
find what 2 factors of -24 add to -2
-6 and 4
split middle up like that

8x²+4x-6x-3=0
gropu and factor
(8x²+4x)+(-6x-3)=0
4x(2x+1)+(-3)(2x+1)=0
undistribute
(4x-3)(2x+1)=0

set each to zero

4x-3=0
4x=3
x=3/4

2x+1=0
2x=-1
x=-1/2

x=-1/2 or 3/4

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3 years ago

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2 years ago

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3 0

3 years ago

Read 2 more answers

2.8 percent is what whole number

yuradex [85]

If your round it to the nearest whole number it will be 3

6 0

4 years ago

Write the equation of the line passing through the points (-7,9) and (7,5).

inn [45]

Answer:

$y=-\frac{2}{7} x+7$

Step-by-step explanation:

First Solve For The Slope Using The Two Given Points!

M = Slope

M = $\frac{y2-y1}{x2-x1}$

M = $\frac{5-9}{7--7}$ Two negative signs together makes addition!

M = $\frac{-4}{14}$ Move the negative sign (only if the fraction has a negative)

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Then see how many units the graph goes up = y-intercept

Answer: 7

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3 years ago