(x^2+3x-4)(x^2-x-6)+24因式分解 详细一些,谢了
(x^2+3x-4)(x^2-x-6)+24因式分解 详细一些,谢了
(x^2+3x-4)(x^2-x-6)+24
=(x+4)(x-1)(x-3)(x+2)+24
=[(x+4)(x-3)][(x-1)(x+2)]+24
=(x²+x-12)(x²+x-2)+24
=(x²+x)²-14(x²+x)+48(把x²+x看成一个整体再用十字相乘)
=(x²+x-6)(x²+x-8)
=(x+3)(x-2)(x²+x-8)
不懂的还可以问!满意请及时采纳! O(∩_∩)O
因式分解(x∧2-x-6)(x∧2+3x-4)+24
( x" - x - 6 )( x" + 3x - 4 ) + 24
= ( x" - 3x + 2x - 6 )( x" + 4x - x - 4 ) + 24
= [ x( x - 3 ) + 2( x - 3 ) ][ x( x + 4 ) - ( x + 4 ) ] + 24
= ( x - 3 )( x + 2 )( x + 4 )( x - 1 ) + 24
= ( x - 1 )( x + 2 )( x - 3 )( x + 4 ) + 24
= ( x" + x - 2 )( x" + x - 12 ) + 24
= ( x" + x )" - 2( x" + x ) - 12( x" + x ) + 24 + 24
= ( x" + x )" - 14( x" + x ) + 48
= ( x" + x )" - 6( x" + x ) - 8( x" + x ) + 48
= ( x" + x )( x" + x - 6 ) - 8( x" + x - 6 )
= ( x" + x - 6 )( x" + x - 8 )
将(X^2-X-6)(X^2+3X-4)-144分解因式
(X^2-X-6)(X^2+3X-4)-144
=(x+2)(x-3)(x-1)(x+4)-12^2
==(x+2)(x-1)(x-3)(x+4)-12^2
=(x^2+x-2)(x^2+x-12)-12^2
={(x^2+x)-14(x^2+x)+24}-144
={(x^2+x)-14(x^2+x)-120
={(x^2+x)-6}{(x^2+x)-20}
=(x^2+x-6)(x-4)(x+5)
x^4-3x^3+x^2y+2x^2-2xy因式分解 过程详细一些,谢了
解答:
x^4-3x^3+x^2y+2x^2-2xy=(x^4-3x^3+2x^2)+(x^2y-2xy)
=x^2(x-1)(x-2)+xy(x-2)
=x(x-2)(x^2-x+y)
因式分解:(1)x^2+3x-4 (2)x^3-+x^2y-x^2z
x^2+3x-4
=(x+4)(x-1)
x^3-+x^2y-x^2z
=x(x²-yz+xy-xz)
=x[x(x+y)-z(x+y)]
=x(x-z)(x+y)
因式分解(x^2-7x+6)(x^2-x-6)+56
=(x-1)(x-6)(x+2)(x-3)+56 乘式中1,4 2,3 结合
=(x^2-4x+3)(x^2-4x-12)+56 将x^2-4x看做一项
=(x^2-4x)^2-9(x^2-4x)+20
=(x^2-4x-4)(x^2-4x-5)
(x^2-7x+6)(x^2-x-6)+56 因式分解
=(x-1)(x-6)(x+2)(x-3)+56 乘式中1,4 2,3 结合
=(x^2-4x+3)(x^2-4x-12)+56 将x^2-4x看做一项
=(x^2-4x)^2-9(x^2-4x)+20
=(x^2-4x-4)(x^2-4x-5)
=(x^2-4x-4)(x-5)(x+1)
因式分解:(x^2+4x+6)(x^2+6x+6)-3x^2
原式 = [x^2 + 6 + 5x]^2 - x^2 - 3x^2 = [x^2 + 5x + 6]^2 - 4x^2
= (x^2 + 7x + 6)(x^2 - 3x + 6) = (x+1)(x+6)(x^2 - 3x + 6)
(X^2+4x+6)(x^2+6x+6)-3x^2 因式分解
原式=(X²+4x+6)²+2x(x²+4x+6)-3x²
=(x²+4x+6+3x)(x²+4x+6-x)
=(x+1)(x+6)(x²+3x+6)