Đáp án:
a, `x(2x^2 - 3) - x^2(5x + 1) + x^2`
`= 2x^3 - 3x - 5x^3 - x^2 + x^2`
`= -3x^3 - 3x`
b, `3(2^2 + 1)(2^4 + 1)(2^8 + 1)(2^{16} + 1)`
`= (2^2 - 1(2^2 + 1)(2^4 + 1)(2^8 + 1)(2^{16} + 1)`
`= (2^4 - 1)(2^4 + 1)(2^8 + 1)(2^{16} + 1)`
`= (2^8 - 1)(2^8 + 1)(2^{16} + 1)`
`= (2^{16} - 1)(2^{16} + 1)`
`= 2^{32} - 1`
c, `3x(x - 2) - 5x(1 - x) - 8(x^2 - 3)`
`= 3x^2 - 6x - 5x + 5x^2 - 8x^2 + 24`
`= -11x + 24`
Giải thích các bước giải: