2 câu trả lời
40^2 - 28^2 +32^2 +80×32
= ( 40+28).(40-28) + 32.( 32+80)
= 68 . 12 + 32 112
= 816 + 3584
= 4400
Đáp án:
40^2 - 28^2 +32^2 +80×32
= ( 40+28).(40-28) + 32.( 32+80)
= 68 . 12 + 32 112
= 816 + 3584
= 4400
40^2 - 28^2 +32^2 +80×32
= ( 40+28).(40-28) + 32.( 32+80)
= 68 . 12 + 32 112
= 816 + 3584
= 4400
Đáp án:
40^2 - 28^2 +32^2 +80×32
= ( 40+28).(40-28) + 32.( 32+80)
= 68 . 12 + 32 112
= 816 + 3584
= 4400