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The expression 2x² + ax is equivalent to x (2x + 7) for some constant a. What is the value of a ?

The expression 2x² + ax is equivalent to x (2x + 7) for some constant a. What is the value of a ?
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5 votes
The expression 2x² + ax is equivalent to x (2x + 7) for some constant a. What is the value of a ?

asked
User OscarLar
by
8.4k points

1 Answer

6 votes
2x^2 + ax = x(2x+ 7)
2x^2 + ax = 2x^2 + 7x
Subtract 2x^2 from both sides
ax = 7x
a = 7
answered
User Edouard Barbier
by
8.7k points
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