Question

a(b-4)-b(a-3) при а=2,5 b=1/3

Answer 1

ab - 4a - ab + 3b = -4a + 3b = - 10 + 1 = 9)))

Answer 2

2,5(1/3-4)-1/3(2,5-3)=2,5×1/3-4×2.5-2.5×1/3+1/3×3=-4×2.5+1/3×3=-10+1=-9