计算或化简求值(1)0.5^10×(-2)^11+(-5)^0/2+2÷(-2)^2;(2)(3x+2)(3x-2)-5x(x-1)-(2x-1)^2,其中x=-1/3
问题描述:
计算或化简求值(1)0.5^10×(-2)^11+(-5)^0/2+2÷(-2)^2;(2)(3x+2)(3x-2)-5x(x-1)-(2x-1)^2,其中x=-1/3
答
(1)0.5^10×(-2)^11+(-5)^0/2+2÷(-2)^2;= (-2)0.5^10×(-2)^10 + 1/2 + 1/2= (-2)(-1)^10 + 1= -2 +1 = -1(2)(3x+2)(3x-2)-5x(x-1)-(2x-1)^2,其中x=-1/= 9x² - 4 - 5x² +5x - 4x² +4x -1= 9x ...