(2 x-7)^2-4 x^2-50 при x = 100

Question

(2 x-7)^2-4 x^2-50 при x = 100

Answer 1

(2x-7)^2-4x^2-50=4x^2-28x+49-4x^2-50=-28x+49-50=-28x-1

при x=100, -28x-1=-28*100-1=-2800-1=-2801

Answer 2

4x^2+49-28x-4x^2-50=-28x-1=-2800-1=-2801