4x⁴-32x²+1

=4x⁴+12x³+2x²-12x³-36x²-6x+2x²+6x+1

=2x².(2x²+6x+1)-6x.(2x²+6x+1)+(2x²+6x+1)

=(2x²+6x+1)(2x²- 6x+1)

= 4x⁴  - 4x² + 1 - 28x² = [(2x²)² - 2.2x² .1 + 1² ] - 28x² = (2x² - 1)² - (\(\sqrt{28}\).x)²

= (2x² - 1 - \(\sqrt{28}\)x) .(2x²  -1 + \(\sqrt{28}\)x)  = (2x² - 2\(\sqrt{7}\)x - 1). (2x² + 2\(\sqrt{7}\)x -1) 

Phân tích thành nhân tử:

8+12x+6x^2+x^3=

\(ko\)\(thể\)\(phân\)\(tích\)\(đa\)\(thức\)

Ta có \(x^4+10x^3+32x^2+40x+16=\left(x^4+2x^3\right)+\left(8x^3+16x^2\right)+\left(16x^2+32x\right)+\left(8x+16\right)\)

\(=x^3\left(x+2\right)+8x^2\left(x+2\right)+16x\left(x+2\right)+8\left(x+2\right)\)

\(=\left(x+2\right)\left(x^3+8x^2+16x+8\right)=\left(x+2\right)\left(x+2\right)\left(x^2+6x+4\right)\)

\(=\left(x+2\right)^2\left(x^2+6x+4\right)\)

Ta có:

\(\left(x-1\right)\left(x+2\right)\left(x+3\right)\left(x-6\right)+32x^2\)

\(=\left(x^2-7x+6\right)\left(x^2+5x+6\right)+32x^2\)

Đặt : \(x^2+6=a\left(a< 0\right)\). Khi đó pt trở thành:

\(\left(a-7x\right)\left(a+5x\right)+32x^2\)

\(=a^2-2ax-3x^2=\left(a+x\right)\left(a-3x\right)\)

\(=\left(x^2+x+6\right)\left(x^2-3x+6\right)\)

\(x^6+y^6=\left(x^2\right)^3+\left(y^2\right)^3=\left(x^2+y^2\right).\left(x^4-x^2y^2+y^4\right)\\ ---\\ 0,04-9x^2=\left(0,2\right)^2-\left(3x\right)^2=\left(0,2-3x\right)\left(0,2+3x\right)\\ ---\\ 32x^2-2\left(y-1\right)^2=2\left[16x^2-\left(y-1\right)^2\right]=2\left[\left(4x\right)^2-\left(y-1\right)^2\right]\\ =2\left(4x-y+1\right)\left(4x+y-1\right)\)

Phần b nhé

3x mũ 4 mak bạn