Question

Decide which part of the quadratic formula tells you whether the quadratic equation can be solved by factoring.

−b b2 − 4ac 2a

Use the part of the quadratic formula that you chose above and find its value, given the following quadratic equation:

2x2 + 7x + 3 = 0

Answer 1

@ali2x2

Answer 2

Let D = b^2 − 4ac

This is known as the discriminant

Answer 3

If the discriminant D is a perfect square, then ax^2 + bx + c can be factored

Answer 4

Compare

2x^2 + 7x + 3

to

ax^2 + bx + c

Answer 5

what are the values of 'a', 'b' and 'c'?

Answer 6

a = 2, b = 7 and c = 3

Answer 7

So

D = b^2 - 4ac

D = 7^2 - 4(2)(3) ... Plug in a = 2, b = 7 and c = 3

D = 49 - 24

D = 25

Answer 8

is 25 a perfect square?

Answer 9

yes or no?

Answer 10

yes

Answer 11

so 2x^2 + 7x + 3 can be factored

Answer 12

then the ending value is 25

Answer 13

they just want the value of b^2 - 4ac

Answer 14

you type in 25

Answer 15

that's the final value of b^2 - 4ac

Answer 16

where a = 2, b = 7 and c = 3

Answer 17

is 25 the final answerr

Answer 18

yes thats the final value of b^2 - 4ac
where a = 2, b = 7 and c = 3

Answer 19

final value : final value of b^2 - 4ac = 25

where :a = 2, b = 7 and c = 3