解方程x²;-12x 63=o,
X^2-12X-63=0
(X-6)^2=99
X-6=±3√11
X1=6+3√11
X2=6-3√11
x²;-12x=-22.解方程.
x²;-12x=-22
(x-6)²;-36=-22
(x-6)²;=14
x-6=±√14
x=6±√14
(+71/4)-(+6.25)-(-17/2)-(+0.75)-89/4
(+71/4)-(+6.25)-(-17/2)-(+0.75)-89/4
=71/4-25/4+17/4-1/4-89/4
=(71-25+17-1-89)/4
=-27/4