№1
a) x2-3x-10
x2+2x-5x-10
x*(x+2) -5(x+2)
(x+2)*(x-5)
б) -2x2+x+15
-2x2+6x-5x+15
-2x*(x-3)-5(x-3)
№2
a) 4x2+x
x*(4x+1)
б) 12x2-3
3(4x2-1)
в) x2-3x-10
x*(x+2)-5(x+2)
г) 2x2-x-15
2x2+5x-6x-15
x*(2x+5)-3(2x+5)
(2x+5)*(x-3)
д) 8x2+4x-12
4(2x2+x-3)
4(2x2+3x-2x-3)
4(x*(2x+3)-(2x+3))
4(2x+3)*(x-1)
е) -x2-5x+6
-x2+x-6x+6
-x*(x-1)-6(x-1)
-(x-1)*(x+6)
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Answers & Comments
№1
a) x2-3x-10
x2+2x-5x-10
x*(x+2) -5(x+2)
(x+2)*(x-5)
б) -2x2+x+15
-2x2+6x-5x+15
-2x*(x-3)-5(x-3)
№2
a) 4x2+x
x*(4x+1)
б) 12x2-3
3(4x2-1)
в) x2-3x-10
x2+2x-5x-10
x*(x+2)-5(x+2)
(x+2)*(x-5)
г) 2x2-x-15
2x2+5x-6x-15
x*(2x+5)-3(2x+5)
(2x+5)*(x-3)
д) 8x2+4x-12
4(2x2+x-3)
4(2x2+3x-2x-3)
4(x*(2x+3)-(2x+3))
4(2x+3)*(x-1)
е) -x2-5x+6
-x2+x-6x+6
-x*(x-1)-6(x-1)
-(x-1)*(x+6)