Question

Expand each of the following expressions

(b-2) (b+7)​

Answer 1

Answer:

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

Step-by-step explanation:

By algebraic identity:

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

Answer 2

Step-by-step explanation:

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