Question

qual o valor numerico da expressão x²-5x+6 para x=2?

Answer 1

$Para\to x=2\\\\\\ x^{2} -5x+6\to \\\\ 2^2-5*2+6\to \\\\ 4-10+6\to\\\\10-10\to \\\\ 0$

Answer 2

x^2-5x+6
(2)^2-5.2+6
4-10+6
4+6-10
+10-10
0