2×-3y×4y
2×-3
54/x +63/x+6 = 3
f(x-2)= x^3 then f(x) =
0.01x^2+1.2x-212.5=0
solve 2xsqaured-9x=0 by factorization
$$\begin{bmatrix} 1 & 3 & -2 \\\\ 1 & 0 & 2 \end{bmatrix}$$
(16/100)/(8/100)
16%/8%=
Find x/y + y/x, if log(x + y) + log(x - y) = 2log(x + y) - logx - logy - log2.
18h+28=16h
