Question

(2x-3)(2x+3)-(2x+1)² при x=0,5

Answer 1

(2·0.5)(2·0.5+3)-(2·0.5+1)²
1(1+3)-(1+1)²
4-2² 
4 - 4
0


(красивый ответ :з)

Answer 2

To evaluate the expression (2x-3)(2x+3) - (2x+1)² at x=0.5, we simply substitute x with 0.5 and perform the calculations step by step.

Step 1: Evaluate (2x-3)(2x+3) Replace x with 0.5: (2(0.5) - 3)(2(0.5) + 3) = (1 - 3)(1 + 3) = (-2)(4) = -8

Step 2: Evaluate (2x+1)² Replace x with 0.5: (2(0.5) + 1)² = (1 + 1)² = 2² = 4

Now, let's put both results together and find the final answer:

(2x-3)(2x+3) - (2x+1)² at x=0.5 = -8 - 4 = -12

So, when x = 0.5, the value of the expression (2x-3)(2x+3) - (2x+1)² is -12.