Question
Expand the expression
8−2log10(2)−log10(x)
Evaluate
−log10(40x(10−9))
Calculate
−log10(40x×10−9)
Multiply the numbers
−log10(40×10−9x)
Rewrite the expression
More Steps

Evaluate
40×10−9x
Rewrite the expression
More Steps

Evaluate
40×10−9
Express with a positive exponent using a−n=an1
40×1091
Rewrite the expression
10940
10940×x
Rewrite the expression
10940x
−log10(10940x)
Use loga(yx)=loga(x)−loga(y) to transform the expression
−(log10(40x)−log10(109))
Simplify the expression
More Steps

Evaluate
log10(40x)
Use loga(x×y)=loga(x)+loga(y) to transform the expression
log10(40)+log10(x)
Simplify the expression
More Steps

Evaluate
log10(40)
Use loga(x×y)=loga(x)+loga(y) to transform the expression
log10(10)+log10(4)
Use logaan=n to simplify the expression
1+log10(4)
Simplify the expression
1+2log10(2)
1+2log10(2)+log10(x)
−(1+2log10(2)+log10(x)−log10(109))
Use logaan=n to simplify the expression
−(1+2log10(2)+log10(x)−9)
Subtract the numbers
−(−8+2log10(2)+log10(x))
Solution
8−2log10(2)−log10(x)
Show Solution
