Question

解方程,x的平方－5x＋2＝0,给财富

Answer 1

X^2-5X+2=0X^2-5X+2.5^2-2.5^2+2=0 (X-2.5)^2-6.25+2=0 (X-2.5)^2-4.25=0 (X-2.5)^2=4.25 X=根号4.25+2.5 或X=-根号4.25+2.5