`A = (5xy^2-y)^2`
Khi `x=18, y = 10` thì:
`A = (5 . 18 . 10^2 - 10)^2`
`= 80820100`
`B = (3x-1 -2x+3)^2`
`= (x+2)^2`
Khi `x = -100002`.
`-> B = -100000^2 = 10000000000`
a: \(A=\left(5xy^2-y\right)^2=\left(5\cdot18\cdot10^2-10\right)^2\)
\(=\left(9000-10\right)^2=80820100\)
b: \(=\left(3x-1-2x+3\right)^2=\left(x+2\right)^2=\left(-100000\right)^2=10^{10}\)