Who can answer those 2 problems I’ll mark ya brainless

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 - 4x - 5 = 0

Solve for b. ab + c= d b= a + old ob=allc-ch b= (d-c/a

If on=8x-8,lm=7x+4,nm=x-5,and ol=3y-6