Question 93004
multiply both sides by 2 {{{(a+2)^2=196}}}
{{{(a+2)(a+2)=a^2+4a+4}}}
{{{a^2+4a+4=196}}}
Subtract 196 from both sides {{{a^2+4a-192=0}}}
Factor the left side (a-12)(a+16)=0
a= 12
a= -16

Ed Jones