Question

Form a polynomial whose sum and product of zeroew are 5/4 and -3

Answer 1

sum of  zeros is 5/4 and product of zeros -3
then the required equation is:
x²-(sum of the zeros)x+product of the zeros=0
or, x²-(5/4)x+(-3)=0
or, x²-5x/4-3=0
or, 4x²-5x-12=0

Answer 2

Sum of the zeroes = 5/4 and product of zeroes = -3
Quadratic polynomial is 
x² - (sum of the zeroes)x + (product of zeroes)
x² - 5x/4 - 3