imahbanga81
imahbanga81 imahbanga81
  • 03-02-2020
  • Mathematics
contestada

simplify this.

4(b-1)²-9​

Respuesta :

profarouk profarouk
  • 03-02-2020

Answer:

4(b-1)²-9 = 4b²-8b-5

4(b-1)²-9 = (2b+1)(2b-5)

Step-by-step explanation:

4(b-1)²-9 = 4(b²-2b+1)-9 = 4b²-8b-5

another way:

4(b-1)²-9 = [2(b-1)]²-3² = (2b+1)(2b-5)

Answer Link
josshyaby
josshyaby josshyaby
  • 03-02-2020

Answer:

Step-by-step explanation:

4(b-1)²-9​

= 4[(b - 1)(b - 1)] - 9

= 4[b² - b - b + 1] - 9

= 4(b² - 2b + 1) - 9

Opening bracket

= 4b² - 8b + 4 - 9

= 4b² - 8b - 5

Answer Link

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