gingermullinaxp64khi gingermullinaxp64khi
  • 06-06-2019
  • Mathematics
contestada

Multiply

(3x – 7)(3x – 5)
Question 5 options:

9x2 – 36x + 35


9x2 + 36x + 35


9x2+ 6x + 35


9x2 – 36x – 35

Respuesta :

gmany
gmany gmany
  • 05-07-2019

Answer:

[tex]\large\boxed{(3x-7)(3x-5)=9x^2-36x+35}[/tex]

Step-by-step explanation:

[tex]\text{Use FOIL:}\ (a+b)(c+d)=ac+ad+bc+bd\\\\(3x-7)(3x-5)\\\\=(3x)(3x)+(3x)(-5)+(-7)(3x)+(-7)(-5)\\\\=9x^2-15x-21x+35\qquad\text{combine like terms}\\\\=9x^2+(-15x-21x)+35\\\\=9x^2-36x+35[/tex]

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