(х+5)2-x(x-10) при х=1/20

Question

(х+5)2-x(x-10) при х=1/20

Answer 1

(x+5)² - x(x - 10) = x² + 10x + 25 - x² + 10x =20x + 25 = 20 * (-1/20) + 25 = -1 + 25 = 24