answer is : -24
need an explanation?
- step one :
for the first equation
given that x=-10
f(x) =2x-4 if 3x exists in this domain
substituting x in the equation we have
f(-10)=2(-10)-4
f(-10)= -20-4
f(-10)=-24
step two :
for the second equation
given that x=-10
f(x) =x²-+3 if 10<=x<13
x does not exist in this domain
