Question

Given the trinomial 2x^2+4x-2, what is the value of the discriminant?
A.0
B.10
C.32
D.36

Answer 1

\[ 2x^2+4x-2 \] comparing it with \[ ax^2+bx+c\] we find
a= 2, b= 4 & c=2
now discriminant is given as:
\[b^2-4ac= 4^2-4 \times \times 2\times 2 = 16-16=0\]
Hence option A.0 is the correct answer.

@AshleighW

Answer 2

Thank you:)

Answer 3

Sure how?...sorry I just made a account like 10 mins ago lol

Answer 4

@dpasinghCan you help me with 4 more questions...ill give you medals for all?

Answer 5

@AshleighW sure, go aead

Answer 6

Given the trinomial 2x^2+4x+4,predict the type of solutions?
A.2 rational solutions
B.1 rational solution
C.2 irrational solutions
D.2 complex solutions

Answer 7

Select one of the factors x^3y^2+8xy^2-5x^2-40
A.(xy^2+5)
B.(x^2+4)
C.(xy^2-5)
D.(x^2-8)

Answer 8

\[2x^2+4x+4 \rightarrow ax^2+bx+c \rightarrow a= 2, b= 4, c= 4\]
now let us find its discriminant i.e.
\[b^2-4ac = 4^2-4 \times 2 \times 4= 16- 32=-16 < 0 \]
Thus It will have 2 complex solutions. Hence option D.2 complex solutions is the correct Answer.

@@AshleighW

Answer 9

@AshleighW

Answer 10

Select one of the factors of 3x^2+10x+3
A.(3x+1)
B.(3x-1)
C.3x+3)
D.None of the above

Answer 11

\[x^3y^2+8xy^2-5x^2-40 = xy^2( x^2+8)-5(x^2+8) =(x^2+8)(8xy^2-5)\]
Hence \[(x^2+8)(xy^2-5) \] are the required factors.

Hence option C.(xy^2-5) is the correct answer.

@AshleighW

Answer 12

And finally..
Select one of the factors of 3x^2+4x-4
A.(x+4)
B.(x-2)
C.(3x+2)
D.(3x-2)

Answer 13

Thanks if you could please answer those last two:)