Question

[nguyễn hoàng khải phong]

rút gọn biểu thức 

a(6x+1)²+(6x-1)²-2(1+6x)(6x-1)

b)3(2²-1)(2⁴+1)(2⁸+1)(2¹⁶+1)

c)x(2x²-3)-x²(5x+3)+3x²

d)3x(x-2)-5x(1-x)-8(x²-3)

Answer 1

[Aoi Ogata]

a) \(=\left[\left(6x+1\right)+\left(6x-1\right)\right]^2\)

\(=\left(12x\right)^2\)

\(=144x^2\)