The qudractic equation is
.
Apply subtraction property of equality: If a = b then a
c = b
c.
(Add
to each side)
(Apply additive inverse property:
).

The equation compare to quadratic equation, then a = 2, b = 7 and c = 3.
Quadratic formula:
.
(Substitute x = w, a = 2, b = 7 and c = 3)
(Evaluate power:
)
(Simplify)
(Subtract: 49 - 24= 25)
Evaluate square roots: 
Separate the solutions
.
(Simplify)

The solution set is
.