Question

how to solve using the quadratic formula
d^2-4d+1=0

Answer 1

find two numbers whose
sum = "-4"
product = "+1"

Answer 2

we cant.. so, we use the quadratic formula

Answer 3

comparing with ax^2 +bx+c-0
sum of roots =-b/a =4
product of roots are c/a=1
hence roots are 1/4 and 4

Answer 4

\[d=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\]

Answer 5

comparing with ax^2 +bx+c-0 sum of roots =-b/a =4 product of roots are c/a=1 hence roots are 1/4 and 4/2

Answer 6

d(approximately equals)3.7321,0.2679

Answer 7

\[d ^{2}-4d+1=0\]
a=1
b=-4
c=1
Plug these into the quadratic formula. See electrokid's post for the formula.