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3x . 6x=
18x
9x
18x218x^218x2
9x29x^29x2
10x . (-2x)=
12x212x^212x2
20x
12x
−20x2-20x^2−20x2
2ab . 6ab =
12a2b212a^2b^212a2b2
8ab
8a2b28a^2b^28a2b2
-12 ab
(2a2c ). (−9a2bc)=\left(2a^2c\ \right).\ \left(-9a^2bc\right)=(2a2c ). (−9a2bc)=
−18 abc -18\ abc\ ^{ }−18 abc
−18a2bc2-18a^2bc^2−18a2bc2
18a4bc218a^4bc^218a4bc2
−18a4bc2-18a^4bc^2−18a4bc2
2a66a5=\ \frac{2a^6}{6a^5}= 6a52a6=
a3\ \frac{a^{ }}{3^{ }} 3a
2a26a4\ \frac{2a^2}{6a^4} 6a42a2
2a66\ \frac{2a^6}{6} 62a6
3a
8a2b4c34 a3bc2=\frac{8a^2b^4c^3}{4\ a^3bc^2}=4 a3bc28a2b4c3=
2a2b4c3c\frac{2a^2b^4c^3}{c^{ }}c2a2b4c3
2b3ca\frac{2^{ }b^3c^{ }}{a^{ }}a2b3c
2b3c2a\frac{2^{ }b^3c^2}{a^{ }}a2b3c2
2b3c4a\frac{2^{ }b^3c^{ }}{4a^{ }}4a2b3c
(4c) . (-5ab)=
-20abc
20abc
9abc
-1abc
-2xy . 4xy=
−4x2y2-4x^2y^2−4x2y2
−8x2y2-8x^2y^2−8x2y2
-2xy
6xy
(-9ab) . (-3abc)=
27a2b2c27a^2b^2c27a2b2c
−27a2b2c-27a^2b^2c−27a2b2c
12abc
-12abc
-2x . (-x)=
2x22x^22x2
-3x
+3x
−2x2-2x^2−2x2
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