(x-2)(x+5)-(x+3)(x-4) при х=-4.5
(-4.5-2)(-4.5+5)-(-4.5+3)(-4.5-4)
(-6.5)(0.5)-(-1.5)(-8.5)
-3.25-12.75
= -16
(x-2)(x+5)-(x+3)(x-4) при х=-4.5
(-4.5-2)(-4.5+5)-(-4.5+3)(-4.5-4)
(-6.5)(0.5)-(-1.5)(-8.5)
-3.25-12.75
= -16