Expand ( x+a) ( x-7) – InterviewSolution

1.

Expand ( x+a) ( x-7)

Answer»

Answer:

${x}^{2} + ax - 7x - 7a$

Step-by-step EXPLANATION:

$(x + a)(x - 7)$

$= {x}^{2} + ax - 7x - 7a$

$= {x}^{2} + (a - 7)x - 7a$

$= {x}^{2} - 7x + a(x - 7)$

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