Answer:
Step-by-step explanation:
Substitute x with -2 to find the value:
f(x)=x^2-3x+4
[tex]\\ \sf\longmapsto f(-2)[/tex]
[tex]\\ \sf\longmapsto (-2)^2-3(-2)+4[/tex]
[tex]\\ \sf\longmapsto 4+6+4[/tex]
[tex]\\ \sf\longmapsto 10+4[/tex]
[tex]\\ \sf\longmapsto 14[/tex]
