Math, asked by sunilmurya8765, 13 hours ago

anwer please mathematics

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Answered by amannscharlie

1

1)

m² - am + 7 = 0

put m = - 1

(-1)² - a(-1) + 7 = 0

1 + a + 7 = 0

a = -8

2)

n(AUB) = n(A) + n(B) - n(AnB)

36 = 20 + 28 - n(AnB)

36 - 48 = - n(AnB)

-12 = - n(AnB)

n(AnB) = 12

3)

13√8 + (√8/2) - 5√8

=(26√8 + √8 - 10√8)/2

= (17√8)/2

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