因式分解 谢谢
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(1)
8x^2+ 26xy - 15y^2
= 8x^2- 4xy + 30xy - 15y^2
= 4x( 2x - y ) + 15y( 2x - y )
= ( 2x - y )( 4x + 15y )
(2)原式=4x^2(2x+1)-(2x+1)
=(2x+1)(4x^2-1)
=(2x+1)(2x-1)(2x+1)
=(2x+1)^2 * (2x-1)
(3)a^4 * b + a^3 * b^2 - a^2 * b^3 - a * b^4
= a^3 * b(a + b) - a * b^3(a + b)
= (a + b)(a^3 * b - a * b^3)
= ab(a + b)(a^2 - b^2)
= ab(a + b)(a + b)(a - b)
= ab(a - b)(a + b)^2
8x^2+ 26xy - 15y^2
= 8x^2- 4xy + 30xy - 15y^2
= 4x( 2x - y ) + 15y( 2x - y )
= ( 2x - y )( 4x + 15y )
(2)原式=4x^2(2x+1)-(2x+1)
=(2x+1)(4x^2-1)
=(2x+1)(2x-1)(2x+1)
=(2x+1)^2 * (2x-1)
(3)a^4 * b + a^3 * b^2 - a^2 * b^3 - a * b^4
= a^3 * b(a + b) - a * b^3(a + b)
= (a + b)(a^3 * b - a * b^3)
= ab(a + b)(a^2 - b^2)
= ab(a + b)(a + b)(a - b)
= ab(a - b)(a + b)^2
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