来自华优基的问题
求下列方程两根的和与积1.x²-5x-10=02.2x²+7x+1=03.3x²-1=2x+54.x(x-1)=3x+7
求下列方程两根的和与积1.x²-5x-10=02.2x²+7x+1=03.3x²-1=2x+54.x(x-1)=3x+7
1回答
2020-05-15 21:15
求下列方程两根的和与积1.x²-5x-10=02.2x²+7x+1=03.3x²-1=2x+54.x(x-1)=3x+7
求下列方程两根的和与积1.x²-5x-10=02.2x²+7x+1=03.3x²-1=2x+54.x(x-1)=3x+7
x²-5x-10=0 x1+x2=5x1x2=-10 2.2x²+7x+1=0x1+x2=-7/2x1x2=1/2 3.3x²-1=2x+53x²-2x-6=0x1+x2=2/3x1x2=-2 4.x(x-1)=3x+7x²-x=3x+7x²-4x-7=0x1+x2=4...