\(a=5\left(-5\right)^2-3\left|-5\right|+2\left(-5\right)-3=5.25-3.5+2.\left(-5\right)-3=97\\ b,\left|x\right|=\dfrac{1}{2}=>x=\dfrac{1}{2};x=-\dfrac{1}{2}\\ TH1,4.\left(\dfrac{1}{2}\right)^3-2.\left(\dfrac{1}{2}\right)^2+3.\dfrac{1}{2}+1=\dfrac{5}{2}\\ TH2,4\left(-\dfrac{1}{2}\right)^3-2\left(-\dfrac{1}{2}\right)^2+3.\left(-\dfrac{1}{2}\right)+1=-\dfrac{3}{2}\)


