[" If a and "B" are the reroes of "x^(2)+5x+8],[" then the value of "a+B" is "]

If a and b are the roots of the equations x^(2) - 5x+ 7 =0 , then value of ab( a+b) is :

If (a-b), a and (a+b) are zeroes of 2x^(3)-12x^(2)+5x-1 , then find the value of a.

If (a-b), a and (a+b) are zeroes of 2x^(3)-12x^(2)+5x-1 , then find the value of a.

If x=(5)/(3) and x=-(1)/(2) are the zeroes of the polynomial ax^(2)-7x+b , then find the values of a and b.

If x=(5)/(3) and x=-(1)/(2) are the zeroes of the polynomial ax^(2)-7x+b , then find the values of a and b.

IF x=0 and x=2 are zeroes of p(x)=2x^3-5x^2+ax+b , find the value of a and b.

If y = 5 - 2.8x and x = 3 – 0.5y be the regression lines ,then the value of b_(yx) is