Question

Log 7 (x2 + 11) = log 7 15
answers;
a)4
b)2
c)3.87
d)12

Answer 1

2

Explanation:

log 7 (x^2 + 11) = log 7 15

x^2 + 11 = 15

-11 -11

x^2 = 4

(
`√(x)^(2)`) = (
`√(4)`)

x = 2

Answer 2

2

Explanation:

i thought 7 is a base so just solve equation

2x+11=15

x=2