Answer:
m = 1/2 or m = -3
Explanation:
m(2m + 5) = 3
Distribute the m on the left side.
2m² + 5m = 3
Subtract 3 from both sides.
2m² + 5m - 3 = 0
Try factoring the trinomial.
(2m - 1)(m + 3) = 0
2m - 1 = 0 or m + 3 = 0
2m = 1 or m = -3
m = 1/2 or m = -3