tlg di bntu sma cara nya.(5x-7) (2x+5)

jawab

( 5x × (-2x)) + ( 7 + 5 )
- 10x + 12

(5x - 7) (2x + 5)
= (5x × 2x) + (5x × 5) + (-7 × 2x) + (-7 × 5)
= 10x^2 + 15x - 14x - 35
= 10x^2 + 1x -35

Cara pengerjaan :
(a + b) (c + d)
= ac + ad + bc + bd