All categories

2 years ago

What is the value of the discriminant for the quadratic equation –3 = –x2 + 2x?

Mathematics

2 answers:

Leni [432]2 years ago

3 0

Answer:

Step-by-step explanation:

The quadratic equation –3 = –x2 + 2x must first be rewritten in standard form:

x^2 - 2x - 3 = 0

or:

1x^2 - 2x - 3 = 0

The coefficients a, b and c are thus {1, -2, -3}, and therefore the discriminant, b^2 - 4ac, is

(-2)^2 - 4(1)(-3), or 4 + 12 = 16

emmainna [20.7K]2 years ago

3 0

Answer:

d) 16

Step-by-step explanation:

edge 2020-2021

You might be interested in

Given that R = 8 x + 4 y Find y when x = 8 and R = 30 Give your answer as an improper fraction in its simplest form.

QveST [7]

Answer:

25/8

Step-by-step explanation:

Given That:

R = 8x+4y

X= 8

R = 30.

So, 8 x 8 +4y = 30

Simplify, Rearrange and solve.

64 + 4y = 30

4y = 30/64 = 15/32

y = 15/32 divided by 4

y = 15 / 32 x 1/4

y = 15/(32 x 4) = 15/128

hope this helps

4 0

3 years ago

Please help me with this question!!!!

Komok [63]

Answer:

EH = 13 in

Step-by-step explanation:

Angle between a tangent and radius is right, that is

∠ EBH = 90° and so Δ EBH is right

Using Pythagoras' identity in the right triangle

EH² = BE² + BH² = 5² + 12² = 25 + 144 = 169 ( square root both sides )

EH = $\sqrt{169}$ = 13

5 0

3 years ago

PLZ HELP ITS DUE RIGHT NOW

daser333 [38]

Answer:

Step-by-step explanation:

Yes.

4 0

2 years ago

Write in terms of inequalities: (-13,4]

anzhelika [568]

9514 1404 393

Answer:

-13 < x ≤ 4

Step-by-step explanation:

The round bracket means the lower limit is not included in the interval. The square bracket means the upper limit is included.

-13 < x ≤ 4

8 0

3 years ago

lara31 [8.8K]

Answer:

Step-by-step explanation:

Given the points J (1,-10) and K (7, 2)

From the section formula

$(x,y)=\left(\dfrac{mx_2+nx_1}{m+n}, \dfrac{my_2+ny_1}{m+n}\right)$

The y-coordinates of the point that divides the directed line segment from J to K into a ratio of 5:1 is obtained using the formula:

$y=\dfrac{my_2+ny_1}{m+n}\\m=5, n=1, y_1=-10, y_2=2\\Therefore:\\y=\dfrac{5*2+1*-10}{5+1}\\=\dfrac{10-10}{6}\\=0$

The y-coordinates of the point that divides the directed line segment from J to K into a ratio of 5:1 is 0.

5 0

3 years ago