Question

how to solved this math???

Answer 1

Answer:

QED

Step-by-step explanation:

3x² + ax + 4

one factor =  x-5

Second factor  = 3x- 0.8   ( 3x to get 3x² and -0.8 to get +4)

So 3x²+ax+4 = (x-5)(3x-0.8)

solving we get

3x²-0.8x-15x+4

3x²-15.8x+4

so a = -15.8

QED