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Mathematics, 09.07.2021 05:50 willoughbysierra

Help pls!! The functionſ is defined by f(x) = x(x + 3). If f(a) = 40 and a > 0, what is the value of a ?
A) 3
B) 5
C) 7
D) 8

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Help pls!! The functionſ is defined by f(x) = x(x + 3). If f(a) = 40 and a > 0, what is the valu...

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