itsdianaduh itsdianaduh

20-10-2017
Mathematics

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choixongdong choixongdong

20-10-2017

a.
-xy = -(-3)(-5) = -15
answer
-15

b.
√(a^2 - 5) - 2b
= √(9-5) - 2 (-4)
= √4 + 8
= 2 + 8
= 10

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