X is a whole number, if three quarter of x is subtracted from 1, the result is always greater than 0 ​

Step-by-step explanation:

"4 times a whole number" ... 4x

"is subtracted from three times the

square of the number"  ...  3x2 - 4x

"the result 15 is obtained"

3x2 - 4x = 15

Subtract 15 from both sides

3x2 - 4x - 15 = 0

This can be factored by grouping.  Multiply

the coefficient of x2 by the constant:

3(-15) = -45

Look for factors of -45 that add to -4:

-9(5)=-45  ...  -9+5 = -4

Replace -4x with -9x+5x and factor by grouping

3x2-9x +5x - 15 = 0

(3x2-9x) + (5x-15) = 0

3x(x-3) + 5(x-3) = 0

(3x+5)(x-3) = 0

Your two answers are found by realizing that

this is true if either

3x+5 = 0    or   (x-3) =0

Solve these two simple equations to get the

final two values of x

where is the image?

step-by-step explanation:

87%

step-by-step explanation:

apex answer