ianjm
ianjm ianjm
  • 03-09-2020
  • Mathematics
contestada

Expand each of the following expressions

(b-2) (b+7)​

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Hrishii
Hrishii Hrishii
  • 03-09-2020

Answer:

[tex] {b}^{2} + 5b - 14[/tex]

Step-by-step explanation:

By algebraic identity:

[tex](x + a)(x + b) = {x}^{2} + (a + b)x + ab \\ we \: have \\ (b - 2)(b + 7) \\ = {b}^{2} + ( - 2 + 7)b + ( - 2)7 \\ = {b}^{2} + 5b - 14[/tex]

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sakshamrijal2527
sakshamrijal2527 sakshamrijal2527
  • 03-09-2020

Step-by-step explanation:

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