2次方程式L1-3-1(6問)
2次方程式を解け
x2+5x+6=0
解答○ ×x2+7x+12=0
解答○ ×x2+7x+10=0
解答○ ×x2+3x+2=0
解答○ ×x2+4x+3=0
解答○ ×x2+9x+20=0
解答○ ×問題と解答
x2+5x+6=0-2,-3 x2+7x+12=0-3,-4 x2+7x+10=0-2,-5 x2+3x+2=0-1,-2 x2+4x+3=0-1,-3 x2+9x+20=0-4,-5
x2+5x+6=0-2,-3 x2+7x+12=0-3,-4 x2+7x+10=0-2,-5 x2+3x+2=0-1,-2 x2+4x+3=0-1,-3 x2+9x+20=0-4,-5
