4а-15в-2при а=1/4, в=3/5

To solve the expression 4a - 15b - 2, we substitute the given values for 'a' and 'b'.

Given: a = 1/4 b = 3/5

Substituting the given values into the expression: 4(1/4) - 15(3/5) - 2

Now, let's simplify the expression step-by-step:

4(1/4) = 1 15(3/5) = 45/5 = 9 So, we have: 1 - 9 - 2

Now, let's subtract: 1 - 9 = -8 -8 - 2 = -10

Therefore, the value of the expression 4a - 15b - 2, when a = 1/4 and b = 3/5, is -10.