Question

Tính nhanh :

3^8 x 5^8 - ( 15^4-1 ) x ( 15^4 + 1 )

Answer 1

${}^{}{}^{}-\left({}^{}-1\right)\left({}^{}+1\right)$

$={}^{}-\left({}^{}-1\right)$

$={}^{}-{}^{}+1=1$

Answer 2

\(3^8.5^8-\left(15^4-1\right)\left(15^4+1\right)\)

\(=15^8-\left[\left(15^4\right)^2-1^2\right]\)

\(=15^8-\left[15^8-1\right]\)

\(=15^8-15^8+1=1\)

Answer 3

3⁸ x 5⁸ - ( 15⁴-1 ) . ( 15⁴ +1 )

= 15⁸ - ( 15⁸ - 1 )

= 15⁸ - 15⁸ + 1

= 1

Answer 4

Trả lời : 

= 1 

Hok tốt