r^2-8r+48=4

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Solution for r^2-8r+48=4 equation:


Simplifying
r2 + -8r + 48 = 4

Reorder the terms:
48 + -8r + r2 = 4

Solving
48 + -8r + r2 = 4

Solving for variable 'r'.

Reorder the terms:
48 + -4 + -8r + r2 = 4 + -4

Combine like terms: 48 + -4 = 44
44 + -8r + r2 = 4 + -4

Combine like terms: 4 + -4 = 0
44 + -8r + r2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-44' to each side of the equation.
44 + -8r + -44 + r2 = 0 + -44

Reorder the terms:
44 + -44 + -8r + r2 = 0 + -44

Combine like terms: 44 + -44 = 0
0 + -8r + r2 = 0 + -44
-8r + r2 = 0 + -44

Combine like terms: 0 + -44 = -44
-8r + r2 = -44

The r term is -8r.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8r + 16 + r2 = -44 + 16

Reorder the terms:
16 + -8r + r2 = -44 + 16

Combine like terms: -44 + 16 = -28
16 + -8r + r2 = -28

Factor a perfect square on the left side:
(r + -4)(r + -4) = -28

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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