( 6x - 5 ) ( 7x - 5 ) = ... ?Note :Dah kletek" tangan v:

( 6x – 5 ) ( 7x – 5 ) = … ?Note :Dah kletek” tangan v:

Penjelasan dengan langkah-langkah:

( 6x – 5 ) ( 7x – 5 )

= (6x×7x) – (6x×5) – (5×7x) + (5×5)

= 42x² – 30x – 35x + 25

= 42x² – 65x + 25

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( 6x – 5 ) ( 7x – 5 )

= 6x(7x – 5) – 5(7x-5)

= 42x² – 30x – 35x + 25

= – 30x – 35x + 42x² + 25

= -65x + 42x² + 25