### 4 Answers

Relevance

- DWReadLv 77 years ago
r² + 3r = 5

set to 0

r² + 3r - 5 = 0

quadratic formula

r = [-3 ± √(3² + 4·1·5)]/(2·1)

= [-3 ± √29]/2

= -1.5 ± 0.5√29

≅ -4.193, 1.193

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Relevance

- DWReadLv 77 years ago
r² + 3r = 5

set to 0

r² + 3r - 5 = 0

quadratic formula

r = [-3 ± √(3² + 4·1·5)]/(2·1)

= [-3 ± √29]/2

= -1.5 ± 0.5√29

≅ -4.193, 1.193

Still have questions? Get your answers by asking now.