Question

me ajudem

x²-9.x+15 x=5

Answer 1

x²-9.x+15 x=5
25-45+75
25-120
-95 

Answer 2

$x^{2} -9.x+15~~~~~com~~~~~x=5 \\ \\ (5)^2-9(5)+15= \\ \\ 25-45+15= \\ \\ 40-45=\fbox{ -5 }$