Question

упрости и вычисли....... 1.5(-2.4a+3.8b)-1.6(2.5a-b)

Answer 1

= -3.6a +5.7b -4a +1.6b =7.3b -7.6a, при а=2, b = -3, =7.3*(-3) -7.6*2 = -21.9 -15.2 = -37.1

Answer 2

.....= - 3,6а+5,7в-4а+1,6в= - 7,6а+7,3в

при а=2,  в= - 3
-7,6*2+7,3*( -3)= - 37,1