Question

Help please

Answer 1

@baru

Answer 2

@welshfella

Answer 3

the value of the discriminant (b^2 - 4ac)
can you do that?

Answer 4

the a b and c are the values in
ax^2 + bx + c

Answer 5

1?

Answer 6

compare 4x^2 + 9x + c
with ax^2 + bx + 5

a = 4, b = ? and c = ?

Answer 7

b=9 and c=5

Answer 8

b^2 - 4ac = 9^2 - 4* 4*5 = 81-80 = 1

Yes 1 is correct.

So what does that tell us about the roots?

Answer 9

AS its >0 it means that there are 2 roots and they are different and real numbers

Answer 10

So C?

Answer 11

so we know its not A (not complex)

Answer 12

No
as all the terms are positive the factors wil be of the form
(hx + j)(hx + k) so the 2 roots will be negative.

Answer 13

Oh so negative?

Answer 14

we can factor it
it comes to
(x + 1)(4x + 5) = 0

so x = -1 ,-1.25

Answer 15

yes 2 negative

Answer 16

OK?

Answer 17

So choice B =)

Answer 18

Thank you

Answer 19

B yes
yw