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"A² + b² + c² + 2ab + 2bc + 2ca is equal to" Multiple Choice Questions (MCQ) on sound and sound waves with choices (a + b - c)², (a + b + c)², 2abc (a + b + c)², and (a - b + c)² for online school classes. Practice algebraic formulas and applications quiz questions for online certificate programs for high school graduation certificate.

MCQ: A² + b² + c² + 2ab + 2bc + 2ca is equal to

1. (a + b - c)²
2. (a + b + c)²
3. 2abc (a + b + c)²
4. (a - b + c)²

B

MCQ: If a + b = 5 and a - b = 3 then the value of a² + b² should be

1. 21
2. 15
3. 17
4. 11

C

MCQ: (a + b)² + (a - b)² is equal to

1. a² + b²
2. 2(a² + b²)
3. a² - b²
4. 2(a² - b²)

B

MCQ: If a + b = 5 and a - b = 3 then the value of ab should be

1. 4
2. 5
3. 3
4. 6

A