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Zepler [3.9K]
3 years ago
12

What is the value of the discriminant, b2 − 4ac, for the quadratic equation 0 = x2 − 4x + 5, and what does it mean about the num

ber of real solutions the equation has?
Mathematics
1 answer:
suter [353]3 years ago
8 0

We have been given an equation 0 = x^2-4x + 5. We are asked to find the discriminant of our given equation.    

We will use discriminant formula to solve our given problem.

D=b^2-4ac, where,

D = Discriminant,

b = Coefficient of x term,

a = Coefficient of x^2 term,

c = Constant.

D=(-4)^2-4(1)(5)

D=16-20

D=-4

When D is less than 0, then equation has no real solutions.

When D is equal to 0, then equation one real solution.

When D is greater than 0, then equation has two real solutions.

Since -4 is less than 0, therefore, our given equation has no real solutions.

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3 0
3 years ago
-2(bx-5)=16 what is the value of x in terms of b and what is the value of x when b is 3?
Savatey [412]
Answer= -54



-2(bx-5)=16

If b is 3, then it changes to -2(3x-5)=16

We want to find x, right? Then we must do -2•3x and -2(-5). The result would be -6x and 10.

Then again, the equation would change -6x+10=16
Which would be -6x=6
Is x=6/6

And then x would be 1


Please tell me what I did wrong and if it is wrong, comment on this and I’ll fix my mistake!^^

7 0
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Can someone please help me with 9 and 10!!! Thank you so much!!!
Dmitrij [34]
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Which ordered pair is a solution to the system of linear equations? 2x + 3y= 6 –3x + 5y = 10
n200080 [17]

Answer:

(0,2)

Step-by-step explanation:

solve by addition/elimination

2x + 3y= 6

–3x + 5y = 10  

multiply first equation by 3  and second one by 2 to eliminate x)

6x+9y=18

-6x+10y=20 (add the two equations)

6x+9y-6x+10y=38

19y=38

y=38/19=2

2x+3y=6

2x=6-6

x=0

7 0
3 years ago
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