r^2+3r+70=0

Solution for r^2+3r+70=0 equation:

Simplifying
r2 + 3r + 70 = 0

Reorder the terms:
70 + 3r + r2 = 0

Solving
70 + 3r + r2 = 0

Solving for variable 'r'.

Begin completing the square.

Move the constant term to the right:

Add '-70' to each side of the equation.
70 + 3r + -70 + r2 = 0 + -70

Reorder the terms:
70 + -70 + 3r + r2 = 0 + -70

Combine like terms: 70 + -70 = 0
0 + 3r + r2 = 0 + -70
3r + r2 = 0 + -70

Combine like terms: 0 + -70 = -70
3r + r2 = -70

The r term is 3r.  Take half its coefficient (1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
3r + 2.25 + r2 = -70 + 2.25

Reorder the terms:
2.25 + 3r + r2 = -70 + 2.25

Combine like terms: -70 + 2.25 = -67.75
2.25 + 3r + r2 = -67.75

Factor a perfect square on the left side:
(r + 1.5)(r + 1.5) = -67.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.