Question

Calcule x',x'', xv, yv usando y= x²-11x-26

Answer 1

Xv= -b/2a
Xv= -(-11)/2.1
Xv= 11/2 
Xv=5,5
Yv= 5,5²-11(5,5)-26
Yv=30,25-60,5-26
Yv=-56,25

x²-11-26=0
Δ=-(-11)²-4.1.-26
Δ=121+104
Δ=225
x=-(-11)+-√225/2.1
x'=11+15=26/2=13
x"=11-15=-3/2=-1,5