Question

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Calculate the discriminant.

x2 – 2x + 4 = 0

A.
0

B.
–12

C.
12

D.
20

Answer 1

@paki

Answer 2

use b^2-4ac... and solve...

Answer 3

I dont know how.

Answer 4

here a= 1... b= -2... and c= 4.... now put it in the formula...and solve... what you got...?

Answer 5

@sammy34daisy

Answer 6

(-2)^2-4(1)(4)=
4-16=??

Answer 7

-12

Answer 8

yup -12

Answer 9

can you help me with more please?

Answer 10

yup, will try... :-)

Answer 11

What number would you have to add to both sides to complete the square?

x2 – 16x = –8

A.
–16

B.
16

C.
–64

D.
64

Answer 12

-16/2=-4
(-4)^2=??

Answer 13

16

Answer 14

yes

Answer 15

Solve by using the perfect squares method.

x2 – 12x + 36 = 0

A.
6

B.
18

C.
–18

D.
–6

Answer 16

(x-6)^2=0
x-6=0
x=??

Answer 17

-6?

Answer 18

close

Answer 19

A

Answer 20

yes

Answer 21

Solve. x2 – 5x + 6 = 0

A.
{3, –2}

B.
{–2, –3}

C.
{5, –1}

D.
{2, 3}