Pls. help me find the roots for this math problem

Question

Problem: 2m sq. 13m 20 = 0

I need a solution of a quadratic equation by using the quadratic formula. will appreciate any way of giving me the solution to this. thanks..

Answer 1

2m^2 + 13m + 20 = 0

m = (- 13 +/- sqrt(13^2 - 4 * 2 * 20) ) / (2 * 2)

= (- 13 +/- sqrt(169 - 160) ) / (2 * 2)

= (- 13 +/- sqrt(9) ) / 4

= (- 13 +/- 3 ) / 4

= - 16 / 4 or - 10 / 4

= - 4 or - 5 / 2.

Solution by factorisation would be:

(m - 4)(2m - 5) = 0

m - 4 = 0 yielding m = 4

or

2m - 5 = 0 yielding m = 5 / 2.