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2 years ago

6

If using the method of completing the square to solve the quadratic equation

1 answer:

Katen [24]2 years ago

5 0

Answer: here a, b, and c are real numbers and a≠0. A solution to such an equation is called a root. Quadratic equations can have two real solutions, one real solution, or no real solution. If the quadratic expression on the left factors, then we can solve it by factoring. A review of the steps used to solve by the factory..

Step-by-step explanation:I hope it heps

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A line passes through the points (-1, -1)

Allisa [31]

Given:

A line passes through the points (-1, -1) and (5,8).

To find:

Which points lie on the same line?

Solution:

If a line passes through two points, then the equation of the line is:

$y-y_1=\dfrac{y_2-y_1}{x_2-x_1}(x-x_1)$

A line passes through the points (-1, -1) and (5,8). So, the equation of the line is:

$y-(-1)=\dfrac{8-(-1)}{5-(-1)}(x-(-1))$

$y+1=\dfrac{8+1}{5+1}(x+1)$

$y+1=\dfrac{9}{6}(x+1)$

$y+1=\dfrac{3}{2}(x+1)$

Multiply both sides by 2.

$2(y+1)=3(x+1)$

$2y+2=3x+3$

$2y=3x+3-2$

$y=\dfrac{3}{2}x+\dfrac{1}{2}$

So, the equation of the line is $y=\dfrac{3}{2}x+\dfrac{1}{2}$ .

Now, check each point for this equation.

Putting $x=-3$ , we get

$y=\dfrac{3}{2}(-3)+\dfrac{1}{2}$

$y=\dfrac{-9+1}{2}$

$y=\dfrac{-8}{2}$

$y=-4$

Similarly,

For $x=9,y=15$ .

For $x=1,y=2$ .

For $x=4,y=6.5$ .

For $x=3,y=5$ .

For $x=-2,y=-2.5$ .

Therefore, the points (-3,-4), (9,14), (1,2) and (3,5) lie on the same line but the points (4,7) and (-2,-2) are not on that line.

6 0

3 years ago

I WILL GIVE YOU BRAINLY PLSS

AleksandrR [38]

Answer:

9.34

Step-by-step explanation:

add 6 then mulitiply 11-1 xC=9.34

3 0

2 years ago

Use the image below to determine the missing value for "B" *<br><br> 54<br> 48<br> 84<br> 72

vivado [14]

Answer:

B=48 white flowers

Step-by-step explanation:

For 3 pink flowers=2 white flowers

1 pink flower=2/3 white flowers

Now

72 pink flower=(2/3)×72 white flowers

72 pink flowers=2×24 white flowers

72 pink flowers=48 white flowers

7 0

3 years ago

Simplify 9x - 4 + 3x

rewona [7]

Answer:

$4(3x - 1)$

Step-by-step explanation:

$9x - 4 + 3x$

Adding 9x & 3x gives 12x.

$= > 12x - 4$

Now taking 4 common from both the terms , we get :-

$4(3x - 1)$

3 0

2 years ago

I need help with this question

Temka [501]

Answer:

It would be b I think

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers