2² × 5² × 7²
= ( 2 × 2 ) × 5² × 7²
= 4 × 5² × 7²
= 4 × ( 5 × 5 ) × 7²
= 4 × 25 × 7²
= 4 × 25 × ( 7 × 7 )
= 4 × 25 × 49
= 100 × 49
= 4.900
5² × 5²
= ( 5 × 5 ) × 5²
= 25 × 5²
= 25 × ( 5 × 5 )
= 25 × 25
= 625
= (2 × 2) × (5 × 5) × (7 × 7)
= 4 × (5 × 5) × (7 × 7)
= 4 × 25 × (7 × 7)
= (5 × 5) × (5 × 5)
= 25 × (5 × 5)
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2² × 5² × 7²
= ( 2 × 2 ) × 5² × 7²
= 4 × 5² × 7²
= 4 × ( 5 × 5 ) × 7²
= 4 × 25 × 7²
= 4 × 25 × ( 7 × 7 )
= 4 × 25 × 49
= 100 × 49
= 4.900
5² × 5²
= ( 5 × 5 ) × 5²
= 25 × 5²
= 25 × ( 5 × 5 )
= 25 × 25
= 625
2² × 5² × 7²
= (2 × 2) × (5 × 5) × (7 × 7)
= 4 × (5 × 5) × (7 × 7)
= 4 × 25 × (7 × 7)
= 4 × 25 × 49
= 100 × 49
= 4.900
5² × 5²
= (5 × 5) × (5 × 5)
= 25 × (5 × 5)
= 25 × 25
= 625