Question

f(x)=x²-5x+6 then find f(2)+f(-2)​

Answer 1

Answer:

$\sf \: f(x) = x {}^{2} + 5x + 6 \\ \sf \: find \: f(2) \\ \sf \: (2) {}^{2} + 5(2) + 6 \\ \sf \: 4 + 10 + 6 = 20$

$\sf \: find \: f( - 2) \\ \sf \:x {}^{2} - 5x + 6 \\ \sf( - 2) {}^{2} - 5( - 2) + 6 \\ = 20$

$\sf \: find \: f(2) + ( - 2) \\ \sf \: 20 + ( - 20) = 0$