perkalian (9+x)(6+7x)

[tex](9 + x)(6 + 7x) \\ pake \: capit \: kepiting \\ (9\times 6) +(9 \times 7x) + (x \times 6) + (x \times 7x) \\ = 54 + 63x + 6x + {7x}^{2} \\ = {7x}^{2} + 69x + 54[/tex]
Semoga membantu ^^