This is an exponential
equation.
For the beginning, we'll write 1/64 =
1/4^3
We'll apply the property of negative
power:
1/4^3 = 4^(-3)
Now,
we'll re-write the equation:
4^(x^2-4x) =
1/64
4^(x^2-4x) = 4^(-3)
Since
the bases are matching, we'll apply one to one
property:
x^2-4x = -3
We'll
add 3 both sides:
x^2-4x+3 =
0
According to the rule, the quadratic equation could be
written as:
x^2 - Sx + P =
0
From Viete's relations, we'll
get:
S = x1 + x2
x1 + x2 =
4
x1*x2 = 3
x1 =
1
x2 =
3
The solutions of the
equation are :{1 ; 3}.
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