Titiknya 10 dan 8
∫x-8)( x-9) (x-10) dx

Consider the substitution,

so that the integral is equivalent to

Notice that

which means is odd, so

Perhaps more work than necessary, but it does make it easier to see that the original integrand exhibits some symmetry about .

three-fourths of an hour

36÷48=0.75

0.75=