Compute the value of the discriminant and give the number of real solutions of the quadratic equation. -2x^2+8x-1=0

1 answer:

4 0

Divide given eq. by -2, we get, x^2-4x+0.5=0. Here a=1, b=-4 and c=0.5. As disccriminant is given by sqrt(b^2-4*a*c).so sqrt((-4)^2-4*1*0.5)=3.7417.
Real roots are x1,2=-b+-discriminant
x1=-4+3.7417=-0.2583 and x2=-4-3.7417=-7.7417

You might be interested in

What is 15% of $150?'

AleksandrR [38]

Answer:

$22.50

Step-by-step explanation:

15% of 150=22.5

6 0

2 years ago

An angle measures 28º less than the measure of its complementary angle. What is the measure of

GuDViN [60]

Answer:

Let the angle=x

So the other angle will be = y

X-28 +y=90

5 0

2 years ago

A landscaper is making a garden bed in the shape of a rectangle. The length of the garden bed is 2.5 feet longer than twice the

Step2247 [10]

Answer:

I'll setup the problem, then you can do the calculations

Step-by-step explanation:

Perimeter = 2width(W) + 2length (L)

Area = LW

L = 2.5 + 2W

LW = 62.5

substitute L in equation for area

$2.5W + {2W}^{2} = 62.5 \\ \\ {2W}^{2} + 2.5 - 62.5 \\ \\ use \: quadratic \: solution \\\frac{ - b ± \sqrt{ {b}^{2} - 4ac}}{2a}$

a = 2; b = 2.5; c = 62.5

send a comment if you have a question

7 0

2 years ago

Question below :)))))))))))))))))

nalin [4]

25 candy in a bag, if 2/5 or 40% of candy is caramels. Then 10 in each bag is caramels.

Your answer would be C.

3 0

2 years ago

Read 2 more answers

Please help please help!!!

True [87]

Step-by-step explanation:

If the die has 6 sides, this will be 10 or under, but there are 2160 ways this can happen

8 0

2 years ago