Give that α & β are roots of the equation 2x^{2 }+ 5x - 7 = 0 Find without solving the equation the value of (α -β)^{2} Need to calculate the sum of the root and the product of the roots
In the sum of the roots is and the products of the roots is .
I have that part the answer I got was 20 1/4 but is the working of the sum of the roots part (α -β)^2 where I have (α -β) + (α -β) unable to figure out the value