Respuesta:
( 9 + 12 ) ( 9 - 12 )
Explicación paso a paso:
81 = 9 x 9 = 9²
144 = 12 x 12 = 12²
81 - 144
= 9² - 12²
Formula : -
a² - b² = ( a + b ) ( a - b )
Aqui,
a = 9
b = 12
9² - 12² = ( 9 + 12 ) ( 9 - 12 )
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Respuesta:
( 9 + 12 ) ( 9 - 12 )
Explicación paso a paso:
81 = 9 x 9 = 9²
144 = 12 x 12 = 12²
81 - 144
= 9² - 12²
Formula : -
a² - b² = ( a + b ) ( a - b )
Aqui,
a = 9
b = 12
9² - 12² = ( 9 + 12 ) ( 9 - 12 )