Question

(5a^(2)-2a)/(1-4a) при а=-0,2

Answer 1

Ответ:5a²-2a/1-4a

a(5a-2)/1-4a

-2(-12)/1+8=24/9=8/3

Answer 2

To evaluate the expression (5a^2 - 2a)/(1 - 4a) at a = -0.2, we substitute the value of a into the expression:

(5(-0.2)^2 - 2(-0.2))/(1 - 4(-0.2))

Let's calculate it step by step:

First, we calculate the numerator: (5(-0.2)^2 - 2(-0.2)) = (5 * 0.04) - (-0.4) = 0.2 + 0.4 = 0.6

Next, we calculate the denominator: (1 - 4(-0.2)) = (1 + 0.8) = 1.8

Now, we can calculate the expression: (5a^2 - 2a)/(1 - 4a) = 0.6/1.8 = 1/3

Therefore, when a = -0.2, the expression (5a^2 - 2a)/(1 - 4a) evaluates to 1/3.