Question

Tính nhanh 

107^{2 _}49

Answer 1

\(107^2-49\)
\(=11449-49\)
\(=11400\)

Answer 2

107² - 49

= 107² - 7²

= (107 - 7)(107 + 7)

= 100 . 114

= 11400

Answer 3

\(107^2-49\)

\(=100\cdot114=11400\)

Answer 4

\(107^2-49=107^2-7^2=\left(107-7\right).\left(107+7\right)=100.114=11400\)