2+3

2+3

Solve[(x^2)-8x+9==0]

Solve[(x^2)-ax+9==0,x]

Solve[b (x^3)+(x^2)-a x+9==0,x]

Solve[(x^2)-8x+Sin[x]+9==0,x]

NSolve[(x^2)-8x+Sin[x]+9==0,x]

FindRoot[(x^2)-8x+Sin[x]+9==0,{x,4+(Sqrt[7])}]

FindRoot[(x^2)-8x+Sin[x]+9==0,{x,-1}]

{x->1.5504680831576068`}

FindRoot[(x^2)-8x+Sin[x]+9==0,{x,0}]

{x->1.5504680831576068`}

чертане на графика:

Plot[(x^2)-8x+Sin[x]+9,{x,-10,20}]

Plot[(x^2)-8x+100Sin[x]+9,{x,-10,20}]

Plot[(x^2)-8x+100Sin[x]+9,{x,-1,1}]

дефиниране на функция:

f[x_]:= (x^2)-8x+100Sin[x]+9

f[x]

f[-1]

f[-1.0]

f[1.0]