Question

Parabola question Please help

Answer 1

whats the question

Answer 2

what is the discriminate of this equation: y=-4(x-3)^2+8

Answer 3

hears the graph

Answer 4

the discriminant is 2128 do you want me to explain it as well?

Answer 5

you can simply calculate the discriminate \[b^{2} - 4ac\] by putting the equation in the form \[y=ax^{2} + bx +c\]

Answer 6

Please explain
Sorry had bad internet

Answer 7

@zainulafaq is it 2128 or 128 ?

Answer 8

does the B and C stand as coordinates

Answer 9

firstly expand the equation to standard for i.e \[a x^{2} +bx +c\] which in this case is \[-4x^2 +24x -28\]

Answer 10

a, b, c are coefficients of \[x^2 , x \] and constant respectively in the expanded form . .

Answer 11

no they are not coordinates it tells u the nature of the roots whether they are real or imaginary

Answer 12

k I got it so far
Do we solve for x?

Answer 13

then use the formula for discriminant as @Avva has suggested to find value of discriminant
a=-4, b-24, c= -28

Answer 14

??

Answer 15

No if the question asks for discriminant you just have to tell the numerical value of \[[b^2 - 4ac] \]

Answer 16

k so if we plug in the numbers
-24^2-4(-4)(-28)

Answer 17

right?

Answer 18

exactly thats perfect

Answer 19

and we simplify to get our answer right

Answer 20

@zainulafaq so is it 130 and my work is shown below @zainulafq
-24^2-4(-4)(-28)
576+16(-28)
576-448=130

Answer 21

all of it is excellent except for last step . . 576-448 = 128 not 130 . . .

Answer 22

whoops so 128 is my answer

Answer 23

yup now its fine :)

Answer 24

thanks

Answer 25

welcome :)