Given that the quadratic equation x^2 + 7x + 13 = 0 has roots a and b, find the value of a+b and ab.
Remember that for a general quadratic equation Ax^2 + Bx + C = 0, the sum of the roots = -B/A and the product of the roots = C/A.In our question, A = 1, B = 7, C = 13.So a + b = -7/1 = -7 and ab = 13/1 = 13
NT
Answered by Nathan T. • Further Mathematics tutor
3519 Views
See similar Further Mathematics A Level tutorsRelated Further Mathematics A Level answers
All answers ▸A=[5k,3k-1;-3,k+1] where k is a real constant. Given that A is singular, find all the possible values of k.
Further Maths: How do you find the inverse of a 2 x 2 matrix?
Find the integrating factor of the following first order ODE: dx/dt = -2tx +t.
Show that the set of real diagonal (n by n) matrices (with non-zero diagonal elements) represent a group under matrix multiplication