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A student was asked to find the square of 7x + 3. The student quickly wrote
(7x + 3)2 = 49x2 + 9. Identify the student's error and provide the correct answer.
The student's error was:

Respuesta :

betikuadeniyi

Answer: +42x

Step-by-step explanation:

The student only multiplied each term individually.

He should have (7x+3)² = (7x+3)(7x+3)

Which is 49x²+42x+9

Therefore the error is (42x) or the failure to apply the law of multiplication of variables in a bracket.

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