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cricket20 [7]
2 years ago
5

Multiply the first expression by the second:a2 + b2 + c2 - ab - bc - ca, a + b+ c​

Mathematics
2 answers:
Stels [109]2 years ago
8 0

Answer:

https://orion.math.iastate.edu/dept/links/formulas/form1.pdf

Step-by-step explanation:

Fiesta28 [93]2 years ago
8 0

Please find attached photograph for your answer

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Step-by-step explanation:

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90 = 4b2 - 2b

4b2 - 2b - 90 = 0

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2b + 9 = 0  

2b = -9

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