Question

if a and b are the zeros crore of the polynomial 2x square +7x+5. Find the value of a+b+ab​

Answer 1

Answer:

- 1

Step-by-step explanation:

Sum S and product P of roots of the quadratic polynomials written in form of ax² + bx + c is given by -b/a & c/a respectively.

Here, if a and b are roots/zeroes,

=> S = a + b = - (7/2)

=> P = ab = 5/2

We have to find a+b + ab:

=> (a + b) + (ab)

=> (S) + P

=> (-7/2) + (5/2)

=> (-7 + 5)/2

=> - 2/2

=> - 1