Question

-1,2mn, якщо m=-5; n=-4,2

Answer 1

-1,2•(-5)•(-4,2)= -(1,2•5•4,2)=-(6•4,2)=-25,2

Answer 2

To calculate the expression -1,2mn when m = -5 and n = -4.2, substitute the given values into the expression:

-1,2 * (-5) * (-4.2)

Performing the multiplication:

= -1.2 * (-5) * (-4.2) = 6 * (-4.2) = -25.2

Therefore, when m = -5 and n = -4.2, the expression -1,2mn evaluates to -25.2.