Question

please help me to solve this (4a²+8a-45=0) quadratic equation​

Answer 1

    4a²+8a-45=0

=> 4a²+8a=0

=> 4(a²+2a)=0

=> a²+2a=0/4

=> a(a+2)=0

=> a+2=0/a

=> a+2=0

∴ a = -2