( 2x + 7 ) ( 7x + 2 ) = … ?
( 2x + 7 ) ( 7x + 2 )
= 2x(7x+2) + 7(7x+2)
= 14x² + 4x + 49x + 14
= 14x² + 53x + 14
Penjelasan dengan langkah-langkah:
( 2x + 7 ) ( 7x + 2 )
= (2x × 7x) + (2x × 2) + (7 ×7x) + (7×2)
= 14x² + 4x + 49x + 14
= 14x² + 53x + 14
CMIIW