Question

${x}^{2} - 8x - 5 = 0$
solve this equation
this is a quadric equation​

Answer 1

Question :

${x}^{2} - 8x - 5 = 0$

Solution :

Applying quadratic formula

x²-8x-5

a = 1 b= -8 c = -5

D = b² - 4ac

D = (-8)²-4×1×(-5)

D = 64 +20

D = 84

x = -b±√D/2a

x = -(-8)±√84/2×1

x = 8±√84/2

x = 8-2√21/2 , 8+2√21/2