Question

|2x-3|-4*|5y-6 | при x＝0.78, y＝ 0.9

Answer 1

|2*0.78|-4*|5*0.9-6|
|1.56|-4*|4.5-6|
1.56-4*|-1.5|
1.56-4*1.5
1.56-6
-4.44

Ответ: -4.44

Answer 2

To find the value of the expression |2x-3| - 4 * |5y-6| when x = 0.78 and y = 0.9, simply substitute these values into the expression and perform the calculations step by step.

Step 1: Evaluate |2x-3| for x = 0.78 |2 * 0.78 - 3| = |1.56 - 3| = |-1.44| = 1.44

Step 2: Evaluate |5y-6| for y = 0.9 |5 * 0.9 - 6| = |4.5 - 6| = |-1.5| = 1.5

Step 3: Substitute the values and calculate the final result |2x-3| - 4 * |5y-6| = 1.44 - 4 * 1.5 = 1.44 - 6 = -4.56

So, when x = 0.78 and y = 0.9, the value of the expression |2x-3| - 4 * |5y-6| is -4.56.