2次方程式L1-4-2(8問)
2次方程式を解け
x2-72=0
解答○ ×x2-75=0
解答○ ×x2-2x-10=0
解答○ ×x2-4x+2=0
解答○ ×x2+2x-2=0
解答○ ×x2-6x+4=0
解答○ ×x2+4x-2=0
解答○ ×x2-8x-14=0
解答○ ×問題と解答
x2-72=0±62 x2-75=0±53 x2-2x-10=01±11 x2-4x+2=02±2 x2+2x-2=0-1±3 x2-6x+4=03±5 x2+4x-2=0-2±6 x2-8x-14=04±30
