Zetviz
Answered

(8x-y)(3x+4y)
2x(a-3)
(12+5ab)(12-5ab)

Sagot :

Riza1viz
[tex](8x-y)(3x+4y)=8x\cdot 3x+8x\cdot4y-y\cdot 3x-y\cdot 4y=24x^2+32xy-3xy-4y^2= \\ \\=24x^2+29xy -4y^2[/tex]


[tex]2x(a-3)=2ax-6x \\ \\ \\ (12+5ab)(12-5ab)=12^2-(5ab)^2=144-25a^2b^2[/tex]