Sederhanakan: A, (2a+b) (a-3) B, (x-11) (3x+9) C, (x+9) (x+4) Ayo cepat besok di kumpulkan Jwb yg benar

[tex](2a + b)(a - 3) \\ = 2 {a}^{2} - 6a + ab - 3b [/tex]
[tex](x - 11)(3x + 9) \\ = 3 {x}^{2} + 9x - 33x - 99 \\ = 3 {x}^{2} - 24x - 99[/tex]
[tex](x + 9)(x + 4) \\ = {x}^{2} + 4x + 9x + 36 \\ = {x}^{2} + 13x + 36[/tex]

A.(2a+b)(a-3)=(2a×a)+(2a×-3)+(b×a)+(b×-3)
=2a√-6a+ab-3b
√ maksutnya kuadrat
B.(x-11)(3x+9)=(x.9)+(x.3x)+(-11.3x)+(-11.9)
=9x+3x√-33x-99
=3x√+9x-33x-99
=3x√-24x-99
C.(x+9)(x+4) =(x.x)+(x.4)+(9.x)+(9.4)
=x√+4x+9x+36
=x√+13x+36
yang . itu kali dek
maaf kalau salah