Question

3x的平方减68x加200=0怎么做拜托各位了 3Q

Answer 1

3x^2-68x+200=0 (x-34/3)^2-556/9=0 (x-34/3+ 2√ 139/3)(x-34/3- 2√ 139/3)=0 x1=(34-2 √ 139)/3 x2=(34+2 √ 139)/3