问几道数学计算题(1)x² -10x +24=0(2)2y²+y-6=0(3)5x²+11
3个回答

x² -10x +24=0

(x-6)(x-4)=0

x-6=0 x=6

x-4=0 x=4

2)2y²+y-6=0

(2y-3)(y+2)=0

2y-3=0 y=3/2

y+2=0 y=-2

(3)5x²+11x+6=0

(5x+6)(x+1)=0

5x+6=0 x=-6/5

x+1=0 x=-1

(4)6x²+7x+2=0

(3x+1)(x+2)=0

3x+1=0 x=-1/3

x+2=0 x=-2

(5)6x²+x-15=0

(3x+5)(2x-3)=0

3x+5=0 x=-5/3

2x-3=0 x=3/2

(6)6x²-31x+35=0

(3x-5)(2x-7)=0

3x-5=0 x=5/3

2x-7=0 x=7/2

(7)6x² -13x-15=0

(6x+5)(x-3)=0

6x+5=0 x=-5/6

x-3=0 x=3

(8)2x²+3x+1=0

(2x+1)(x+1)=0

2x+1=0 x=-1/2

x+1=0 x=-1