.Q.
53² - 23² × 7² = ...
• Dahulukan perkalian
Note : Thanks Apii
53² - 23² × 7² = ...
• Dahulukan perkalian
Note : Thanks Apii
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= ( 53 × 53 ) - 23² × 7²
= 2.809 - 23² × 7²
= 2.809 - ( 23 × 23 ) × 7²
= 2.809 - 529 × 7²
= 2.809 - 529 × ( 7 × 7 )
= 2.809 - 529 × 49
= 2.809 - ( 529 × 49 )
= 2.809 - 25.921
= -23.112 ☑
53² - 23² × 7²
= (53 × 53) - (23 × 23) × (7 × 7)
= 2.809 - (529 × 49)
= 2.809 - 25.921
= -23.112