Question

( 45 x 46 + 47 x 48)x (51 x 52 -49x 48) x ( 45 x 128- 90 x 64)x (1995 x 1996 +1997 x 1998)

Answer 1

\(\left(45\cdot46+47\cdot48\right)\cdot\left(51\cdot52-49\cdot48\right)\cdot\left(45\cdot128-90\cdot64\right)\cdot\left(1995\cdot1996+1997\cdot1998\right)\)

\(=\left(45\cdot46+47\cdot48\right)\cdot\left(51\cdot52-49\cdot48\right)\cdot\left(45\cdot2\cdot64-90\cdot64\right)\cdot\left(1995\cdot1996+1997\cdot1998\right)\)

\(=\left(45\cdot46+47\cdot48\right)\cdot\left(51\cdot52-49\cdot48\right)\cdot\left(90\cdot64-90\cdot64\right)\cdot\left(1995\cdot1996+1997\cdot1998\right)\)

\(=\left(45\cdot46+47\cdot48\right)\cdot\left(51\cdot52-49\cdot48\right)\cdot0\cdot\left(1995\cdot1996+1997\cdot1998\right)\)

\(=0\)

Answer 2

 (45 x 46 + 47 x 48) x (51 x 52 - 49 x 48) x (45 x 128 - 90 x 64) x (1995 x 1996 + 1997 x 1998)

=            A              x             B             x (45 x 128 - 45 x 2 x 64) x                C

= A x B x (45 x 128 - 45 x 128) x C

=A x B x 0 x C

=0

Answer 3

kết quả bằng 0

Answer 4

sorry bạn đầu tiên nha lỡ tay

Answer 5

= 0  

vì 45 x 128 - 90 * 64 = 0

Answer 6

tại sao -_- tui dầu tiên mà

Answer 7

(45·46+47·48)·(51·52−49·48)·(45·128−90·64)·(1995·1996+1997·1998)

=(45·46+47·48)·(51·52−49·48)·(45·2·64−90·64)·(1995·1996+1997·1998)

=(45·46+47·48)·(51·52−49·48)·(90·64−90·64)·(1995·1996+1997·1998)

=(45·46+47·48)·(51·52−49·48)·0·(1995·1996+1997·1998)

=0