(9x-6)(9x+6)-25x^2-8x-49 при x=100

Question

(9x-6)(9x+6)-25x^2-8x-49 при x=100

Answer 1

81x^2-36-25x^2-8x-49= 56x^2-8x-85 = 56*(100)^2-8*100-85=


=56*10000-800-85=560 000 -885=559115