Question

The minimum value of (x-2)(x-9) is

Answer 1

$(x - 2)( x - 9) = 0\\ {x}^{2} - 9x - 2x + 18 = 0 \\ {x}^{2} - 11x + 18 = 0 \\ x = 9 \: and \: x = 2 \\ easy \: miniumum \: is \: 2$