Question

Consider the equation kx^2 + 2x = c (2x^2 + b)
For the equation to be quadratic, which of these
cannot be the value of k?
c
2c
3c
2c +2b

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Answer 1

Answer:

2c

Step-by-step explanation:

Equation is writing a function that its image is 0.

kx^2 + 2x = c(2x^2 + b)

kx^2 + 2x = 2c(x)^2 + cb

WRITING THIS AS A EQUATION ,

kx^2 + 2x - 2cx^2 - cb = 0

kx^2 - 2cx^2 +2x - cb = 0

(k-2c)x^2 +2x - cb

If k-2c= 0 ,then k = 2c

So if k = 2c , then the coefficient of x^2 becomes 0 !

In a quadratic equation , the coefficient of x^2 must not be 0 !

THEREFORE IF THE EQUATION MUST BE QUADRATIC ,

THEN k must not be equal to 2c !

I HOPE IT IS HELPFUL !

HAVE A NICE DAY WITH BRAINLY !