Question

Please Help!

Answer 1

the middle formula
b^2 - 4ac

its called the discriminant and can also tell you the number and nature of the solutions of the equation

if the value of the discriminant is a perfect square then you can factor the equation

Answer 2

The expression b^2-4ac Is called the discriminant... If it is zero, or positive and a perfect square (like 4, 9, 25, 36, etc), the solutions to the quadratic equation will be rational numbers and factoring will work... On the other hand, if the discriminant is positive but not a perfect square, the solutions will be irrational, and if it is negative, there are no real solutions. In either of those cases, the quadratic expression cannot be factored...

Answer 3

yes - i omitted if its zero

Answer 4

Okay, so is b^2-4ac is equal to 25?

Answer 5

sorry its 2x^2 + 7x + 3 = 0

a=2,b=7 and c = 3

so the discriminant is

7^2 - 4*2*3 = 48 - 24 = 25


yes

Answer 6

so you can factor it

Answer 7

Okay, so do you think that the final answer would be 5 or 25?

Answer 8

what do you mean by the final answer?
- the discriminant is a perfect square (25) so the equation can be factored

Answer 9

final answer is 25

Answer 10

Oh okay, I wasn't sure if I was supposed to find the sqr rt :)

Answer 11

Okay, thanks! :)

Answer 12

oh i see