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Fofino [41]
3 years ago
14

7-3 Multiplying Binomials

Mathematics
1 answer:
Nataly [62]3 years ago
7 0

Answer:

Step-by-step explanation:

Use FOIL method.First multiply (5x + 1) and (3x - 4). Then multiply (15x² - 17x - 4) by (x +2)

Volume of the rectangular prism = length *width * height

              = (5x + 1) (3x -4)(x +2)

              = [ 5x*3x + 5x*(-4)  + 1*3x + 1*(-4) ] (x + 2)

             = [15x² <u>- 20x + 3x</u> - 4] (x +2)    {Combine like terms}

             = [15x² - 17x - 4] (x + 2)

             =[15x² -17x - 4]*(x) + [15x² - 17x  -4]*2

            = [15x²*x - 17x*x - 4*x ]+ 15x²*2 - 17x *2  - 4*2

            = 15x³ - 17x² - 4x  + 30x² - 34x - 8

           = 15x³ <u>- 17x² + 30x²</u>  <u>- 4x - 34x </u>- 8    {Combine like terms}

           = 15x³ + 13x²  - 38x - 8

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