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irinina [24]
3 years ago
14

Expand each of the following expressions (b-2) (b+7)​

Mathematics
2 answers:
White raven [17]3 years ago
5 0

Answer:

{b}^{2}  + 5b - 14

Step-by-step explanation:

By algebraic identity:

(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

BlackZzzverrR [31]3 years ago
5 0

Step-by-step explanation:

Hope it is helpful for you

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