Question 86238
 12b squared+23b-5=-15
:
12b^2 + 23b - 5 = -15
:
12b^2 + 23b - 5 + 15 = 0; added 15 to both sides
:
12b^2 + 23b + 10
:
Use the quadratic formula to solve for b:
{{{b = (-23 +- sqrt( 23^2 - 4* 12*10 ))/(2*12) }}}
:
Do the math and you should get:
b = -5/4
and
b = -2/3