Question

Which value of k makes (2x + 3)(kx – 5) = 2kx^2 – x – 15 true?
A. –3

B. –1

C. 1

D. 3

Answer 1

2kx^2-10x+3kx-15=2kx^2-x-15. But then what?

Answer 2

the coefficient of the middle term ( -1) is obtained by by + 3k - 10 = -1
solve for k

Answer 3

compare the coefficients ..on both the sides..! so u see k=1

Answer 4

no thats incorrect

Answer 5

@Akpellet_math @cwrw238 I'm sorry but which two terms on both sides do I use?

Answer 6

solveing 3k - 10 = -1 will give you the answer

Answer 7

ok thanks!

Answer 8

the coefficients of x^2 on both sides are 2k - you cant infer anything from this

Answer 9

So D.

Answer 10

ohh ..yes ..i am sorry ..! was in a hurry ..yes the guy is correct .!

Answer 11

thats ok