ksoodagoat
05.02.2020 •
Mathematics
Solve the log equation:
log_(4)(x+5)+log_(4)(x-1)=2
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Ответ:
Solve by re-writing in exponential form using the definition of logarithm and simplifying.
Ответ:
Step-by-step explanation:
L = 4 + w
A = 2P - 4
lw = 2(2l +2w) - 4
lw = 4(l + w) - 4
(w+4)w = 4 ( w+4+w) -4
(w +4)w = 4(2w + 4) - 4
w^2 + 4w = 8w + 16 - 4
w^2 + 4w = 8w + 12
w^2 - 4w - 12 = 0
( w - 6 )( w + 2 ) = 0
w - 6 = 0 > w = 6 > L=10 ---> P = 32 and A = 60
w + 2 = 0 ---> w = -2 <--- width cannot be negative; disqualified/rejected