\
The expression is .
According to subtraction property of equality: if , then
.
(Subtract 1 from each side)
(Additive identity property:
)
(Additive inverse property:
)
According to Multiplication property of equality: if , then
.
(Multiply each side by 5)
(Cancel common terms)
(Multiply:
)
According to division property of equality: if , then
.
(Divide each side by 4)
(Cancel common terms) \ \
(Take square roots of each side)
Product property of square roots:
\For nonnegative real numbers a and b,
Rewrite the (-1) using imaginary unit; that is where i2 = -1.
Quotient property of square roots.
\For nonnegative real numbers a and b,
(Find the square root:
)
(Find the square root:
)
The value of x.