Question

(5с-6)*(5с+6)-(5с-6) в квадрате при с=13

Answer 1

Удачи! Надеюсь, помогла!)

Answer 2

Вот правильный ответ:

Answer 3

To calculate the expression (5c-6)*(5c+6) - (5c-6)^2 when c = 13, we need to substitute the value of c into the expression and perform the calculations step by step.

Step 1: Substitute c with 13 in the expression. (513 - 6)(513 + 6) - (513 - 6)^2

Step 2: Perform the operations within the parentheses. (65 - 6)*(65 + 6) - (65 - 6)^2

Step 3: Perform the operations within the parentheses again. (59)*(71) - (59)^2

Step 4: Perform the multiplications. 4199 - 3481

Step 5: Perform the subtraction. 4199 - 3481 = 718

So, when c = 13, the value of the expression (5c-6)*(5c+6) - (5c-6)^2 is 718.