Khai triển nhị thức $(a-2b)^{5}$

Question

Cơ bản

4 câu trả lời

Answer 1

$a^{5}-5a^{4}b+10a^{3}b^{2}-10a^{2}b^{3}+5ab^{4}-b^{5}$

Answer 2

$a^{5}+10a^{4}b-40a^{3}b^{2}+80a^{2}b^{3}-80ab^{4}+32b^{5}$

Answer 3

$a^{5}-10a^{4}b+40a^{3}b^{2}-80a^{2}b^{3}+40ab^{4}-b^{5}$

Answer 4

$a^{5}-10a^{4}b+40a^{3}b^{2}-80a^{2}b^{3}+80ab^{4}-32^{5}$