因式分解(过程)
2x^2-7x+36x^2-x-55x^2+6xy-8y^2x^2+6x-16x^4-3x^3-28x^20.0625a^4-b^4...
2x^2 -7x+3
6x^2 -x-5
5x^2 +6xy-8y^2
x^2 +6x-16
x^4 -3x^3 -28x^2
0.0625a^4 -b^4 展开
6x^2 -x-5
5x^2 +6xy-8y^2
x^2 +6x-16
x^4 -3x^3 -28x^2
0.0625a^4 -b^4 展开
1个回答
展开全部
(1)2x² -7x+3=(2x-1)(x-3)
(2)6x² -x-5=(x-1)(6x+5)
(3)5x² +6xy-8y^2=(5x-4y)(x+2y)
(4)x²+6x-16=(x+8)(x-2)
(5)x^4 -3x^3 -28x^2=x²(x²-3x-28)=x²(x-7)(x+4)
(6)0.0625a^4 -b^4=(0.25a²)²-(b²)²
=(0.25a²+b²)(0.25a²-b²)
=(0.25a²+b²)(0.5a+b)(0.5a-b)。
(2)6x² -x-5=(x-1)(6x+5)
(3)5x² +6xy-8y^2=(5x-4y)(x+2y)
(4)x²+6x-16=(x+8)(x-2)
(5)x^4 -3x^3 -28x^2=x²(x²-3x-28)=x²(x-7)(x+4)
(6)0.0625a^4 -b^4=(0.25a²)²-(b²)²
=(0.25a²+b²)(0.25a²-b²)
=(0.25a²+b²)(0.5a+b)(0.5a-b)。
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