Answer :
Answer:
x² - 11x + 13
Δ = (-11)² - 4*1*13 = 121 - 52 = 69
therefore :
x1 = [-(-11) + √69]/2*1
<=> x1 = (11 + √69)/2
and
x2 = [-(-11) - √69]/2*1
<=> x2 = (11 - √69)/2
so the correct answers are : C & E
Answer:
x² - 11x + 13
Δ = (-11)² - 4*1*13 = 121 - 52 = 69
therefore :
x1 = [-(-11) + √69]/2*1
<=> x1 = (11 + √69)/2
and
x2 = [-(-11) - √69]/2*1
<=> x2 = (11 - √69)/2
so the correct answers are : C & E