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21-12-2019
Mathematics

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if ab=7 and a+b=6 what is a”squared” + b "squared”

Respuesta :

jimrgrant1 jimrgrant1

21-12-2019

Answer:

a² + b² = 22

Step-by-step explanation:

Note that

(a + b)² = a² + 2ab + b², thus

a² + b² = (a + b)² - 2ab = 6² - (2 × 7) = 36 - 14 = 22

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