3 years ago

Log3 (x squared + 7x + 21) = 2

Mathematics

1 answer:

Nezavi [6.7K]3 years ago

3 0

Step-by-step explanation:

log <base a> b = x

means

a^x = b

3^2 = x^2+7x+21

x^2 + 7x + 21 - 9 = 0

x^2 + 7x + 12 = 0

(x+3)(x+4)

x = -3 or -4

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