Answer:
Two solutions were found :
a = 1/4 = 0.250
a = 3
Step-by-step explanation:
((13 + √217)/8 ; (13 - √217)/8)
4a^2−12a−(a−3)=0
4a^2 - 12a - a - 3 = 0
4a^2 - 13a - 3 = 0
a1 = (13 + √217)/8
a2 = (13 - √217)/8
