Question

solve the following quadratic equations using quadratic formula x²+x-1=0​

Answer 1

Answer:

hey mate !!!!!!!!!!!

Step-by-step explanation:

x=1.62  or  x=−0.62

Explanation:

The quadratic formula is −b±√b2−4ac2a

this is used for formulas ax2+bx+c=0

in your problem,  x2−x−1=0 a=1, b=-1, c=-1

substitute into quadratic  −(−1)±√(−1)2−4(1)(−1)2⋅1

this equals  1±√1+42

1+√52  or 1−√52

x=1.62 or x=−0.62

hope it's helpful ^_^

Answer 2

Answer = x³-1 =o

x³=o +1

x³ =1