因式分解:(1)3a^4-8a^2-16 (2)2x^3-x^2-15x (3)3x^2-10x-8 (4)2x^2+x-15 (5)6x^2-11x=3 (6)4x^2+5x-6(7)6x^2-17x+10 (8)-8x^2+6x+9用十字相乘法!!快点啊,各位~~好的快的追加50分!
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![因式分解:(1)3a^4-8a^2-16 (2)2x^3-x^2-15x (3)3x^2-10x-8 (4)2x^2+x-15 (5)6x^2-11x=3 (6)4x^2+5x-6(7)6x^2-17x+10 (8)-8x^2+6x+9用十字相乘法!!快点啊,各位~~好的快的追加50分!](/uploads/image/z/211969-1-9.jpg?t=%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%EF%BC%9A%281%293a%5E4-8a%5E2-16+%282%292x%5E3-x%5E2-15x+%283%293x%5E2-10x-8+%284%292x%5E2%2Bx-15+%285%296x%5E2-11x%3D3+%EF%BC%886%EF%BC%894x%5E2%2B5x-6%287%296x%5E2-17x%2B10++%288%29-8x%5E2%2B6x%2B9%E7%94%A8%E5%8D%81%E5%AD%97%E7%9B%B8%E4%B9%98%E6%B3%95%EF%BC%81%EF%BC%81%E5%BF%AB%E7%82%B9%E5%95%8A%EF%BC%8C%E5%90%84%E4%BD%8D%7E%7E%E5%A5%BD%E7%9A%84%E5%BF%AB%E7%9A%84%E8%BF%BD%E5%8A%A050%E5%88%86%EF%BC%81)
因式分解:(1)3a^4-8a^2-16 (2)2x^3-x^2-15x (3)3x^2-10x-8 (4)2x^2+x-15 (5)6x^2-11x=3 (6)4x^2+5x-6(7)6x^2-17x+10 (8)-8x^2+6x+9用十字相乘法!!快点啊,各位~~好的快的追加50分!
因式分解:(1)3a^4-8a^2-16 (2)2x^3-x^2-15x (3)3x^2-10x-8 (4)2x^2+x-15 (5)6x^2-11x=3 (6)4x^2+5x-6
(7)6x^2-17x+10 (8)-8x^2+6x+9
用十字相乘法!!快点啊,各位~~好的快的追加50分!
因式分解:(1)3a^4-8a^2-16 (2)2x^3-x^2-15x (3)3x^2-10x-8 (4)2x^2+x-15 (5)6x^2-11x=3 (6)4x^2+5x-6(7)6x^2-17x+10 (8)-8x^2+6x+9用十字相乘法!!快点啊,各位~~好的快的追加50分!
(1)3a^4-8a^2-16
=(3a²+4)(a²-4)
=(3a²+4)(a+2)(a-2)
(2)2x^3-x^2-15x
=x(2x²-x-15)
=x(2x+5)(x-3)
(3)3x^2-10x-8
=(3x+2)(x-4)
(4)2x^2+x-15
=(2x-5)(x+3)
(5)6x^2-11x+3
=(2x-3)(3x-1)
(6)4x^2+5x-6
=(4x-3)(x+2)
(7)6x^2-17x+10
=(6x-5)(x-2)
(8)-8x^2+6x+9
=-(8x²-6x-9)
=-(2x-3)(4x+3)
3a^4-8a^2-16
=(a-4)(3a+4)
2x^3-x^2-15x
=x(2x^2-x-15)
=x(x-3)(2x+5)
3x^2-10x-8
=(3x+2)(x-4)
2x^2+x-15
=(x+3)(2x-5)
6x^2-11x+3
=(2x-3)(3x-1)
4x^2+5x-6
=(4x-3)(x+2)
6x^2-17x+10
=(6x-5)(x-2)
-8x^2+6x+9
=(-2x+3)(4x+3)
3a^4-8a^2-16
=(3a^2+4)(a^2-4)
=(3a^2+4)(a+2)(a-2)
2x^3-x^2-15x
=x(2x^2-x-15)
=x(2x+5)(x-3)
3x^2-10x-8
=(3x+2)(x-4)
=(3x+2)(x+2)(x-2)
2x^2+x-15 <...
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3a^4-8a^2-16
=(3a^2+4)(a^2-4)
=(3a^2+4)(a+2)(a-2)
2x^3-x^2-15x
=x(2x^2-x-15)
=x(2x+5)(x-3)
3x^2-10x-8
=(3x+2)(x-4)
=(3x+2)(x+2)(x-2)
2x^2+x-15
=(2x-5)(x+3)
6x^2-11x+3
=(2x-3)(3x-1)
4x^2+5x-6
=(4x-3)(x+2)
6x^2-17x+10
=(x-2)(6x-5)
-8x^2+6x+9
=(-2x+3)(4x+3)
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