X^2=20.6*20.6+(X-0.3)*(X-0.3)
问题描述:
X^2=20.6*20.6+(X-0.3)*(X-0.3)
答
x^2=20.6*20.6+(x-0.3)*(x-0.3)
x^2=424.36+x^2-0.6x+0.09
0.6x=424.45 x=707.41666...=707.42