提公因式法
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4.
4x²y+( 8xy³ )=4xy( x+2y² )
5.
5(a-b)³+15(b-a)²=5(a-b)²(a-b+3)
6.
2x⁴y³-x³y⁴
=x³y³(2x-y)
=(xy)³(2x-y)
=2³ ·⅓
=8/3
7.
9×10²⁰⁰⁶-10²⁰⁰⁷
=9×10²⁰⁰⁶-10×10²⁰⁰⁶
=(9-10)×10²⁰⁰⁶
=-1×10²⁰⁰⁶
=-10²⁰⁰⁶
8.
x(a+3b-c)-(c-a-3b)
=x(a+3b-c)+(a+3b-c)
=(x+1)(a+3b+c)
=(-1+1)(a+3b+c)
=0×(a+3b+c)
=0
4x²y+( 8xy³ )=4xy( x+2y² )
5.
5(a-b)³+15(b-a)²=5(a-b)²(a-b+3)
6.
2x⁴y³-x³y⁴
=x³y³(2x-y)
=(xy)³(2x-y)
=2³ ·⅓
=8/3
7.
9×10²⁰⁰⁶-10²⁰⁰⁷
=9×10²⁰⁰⁶-10×10²⁰⁰⁶
=(9-10)×10²⁰⁰⁶
=-1×10²⁰⁰⁶
=-10²⁰⁰⁶
8.
x(a+3b-c)-(c-a-3b)
=x(a+3b-c)+(a+3b-c)
=(x+1)(a+3b+c)
=(-1+1)(a+3b+c)
=0×(a+3b+c)
=0
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