given that l=-2, m=3 and n=7 calculate the value of: lm(m-n)

(2*3)(3-7)

(6)(-4)
-24

To calculate the value of lm(m-n), we need to substitute the values of l, m, and n into the expression.

First, substitute l = -2, m = 3, and n = 7 into the expression.

lm(m-n) = (-2)(3)(3-7)

Next, simplify the expression inside the parentheses.

= (-2)(3)(-4)

Now, perform the multiplication.

= -6*(-4)

When multiplying two negative numbers, the result is positive.

= 24

Therefore, the value of lm(m-n) is 24.