Question

I just need someone to say correct or not. No explanation unless I am wrong please :D

4x^2 + 6x + 2 = 0
a: 4
b: 6
c: 2

Answer 1

x = -6 +- _/6^2 - 4(4)(2)/2(4)
x = -6 +- _/36 - 32/8
x = -6 +- _/4/8
x = -6 +- 2/8

+: x = -4/8
x = -1/2

-: x = -8/8
x = -1

Answer 2

http://prntscr.com/c21bl8

Answer 3

You are correct.

Answer 4

@Ciarán95 @pooja195 @mathmate

Answer 5

So what would be the answer? Its a fill in the blank kinda thing

Answer 6

x= -1/2, -1

Answer 7

It says numerical answers expected..

Answer 8

@OswaldMurphy
Yes, your solution is correct.

Answer 9

http://prnt.sc/c21bl8
What would go in the blank @mathmate

Answer 10

Wouldn't it be x= -1/2, -1?

Answer 11

Numerical Answers.

Answer 12

Typically when a quadratic can be factored, we mean it can be factored using rational numbers.
The next question to ask if a quadratic can be factored is therefore "is the solution rational?".
@OswaldMurphy
which part of the quadratic formula could introduce irrational numbers?

Answer 13

Squaring

Answer 14

rational number means a number that can be represented by a fraction, such as 22/7, -4, etc.
Irriational numbers canNOT be represented by a fraction, such as \(\pi,\sqrt{3}\), etc.

Do you think the quadratic formula below can introduce an irrational number, and where?
\(\Large \frac{-b\pm\sqrt{b^2-4ac}}{2a}\)

Answer 15

The division

Answer 16

Please show me an example of a division that makes irrational numbers.

Answer 17

Recall that 22/7 is a rational number.

Answer 18

Yes.