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Ghella [55]
3 years ago
10

Can someone help me write a quadratic formula??

Mathematics
1 answer:
jeka57 [31]3 years ago
7 0
A quadratic equation can be written as: ax² + b.x + c =0
But if you know the values of the 2 roots x' and x", you can write it:
a(x-x')(x-x"), Since the roots are given ( x' = -4 and x" = -5) and also a (=2)
then the equation becomes:
2(x + 4)(x +5) =0
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Solve by using any method of substitution<br><br>4 +8x = y <br>6x - y = 2
Bumek [7]

Answer:

(-3,-20)

Step-by-step explanation:

4 +8x = y ...... equation (1)

6x - y = 2 ........equation(2)

from equation 2

6x - y = 2

6x -(4+8x) =2

6x - 4 + 8x = 2

    +4              +4

6x - 8x = 6

-2x=6

divide by -2

x= -3

put x in equation (1) to solve for y

4 + 8x = y

4+8(-3)=y

4-24=y

-20=y

y= -20

solution = (-3,-20)

8 0
2 years ago
How do you find the measurements of a pentagon?
TEA [102]
Angel D: 56 degrees that's the answer and your welcome
5 0
2 years ago
Read 2 more answers
What is a prime factor​
Rufina [12.5K]
A prime factor is a number with a greatest common factor of 1 and that number. Examples: 3,7,9,11
3 0
2 years ago
There are 70 people attending a high school baseball game. The difference between the number of women and men at the game is 18.
nata0808 [166]
Adding the systems of equations together, we get
2x=88
Dividing both sides by 2, we get x, or the number of women, to be 44.
Plugging that into either equation, we get
44-y=18. Adding y to both sides and subtracting 18, we get y, or the number of men, to be 26. 

Feel free to ask further questions!
7 0
2 years ago
Hey! i just need you to tell me how you got your answer! thank you!
Yakvenalex [24]

5 + 27 ÷ 3 / 6 + 1 - Remember PEMDAS, so start by dividing 27 by 3.

5 + 9 / 6 + 1 - Next, add

14 / 7 Lastly, Divide.

2

5 0
3 years ago
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