mik bấm máy tính nó ra mỗi nghiệm là -2 thui bạn cứ tách từ từ nha bạn

pn có thể trình bày rõ hơn k

mk k hỉu

\(=x^2\left(x-1\right)-4\left(x-1\right)^2=\left(x-1\right)\left[x^2-4\left(x-1\right)\right]\\ =\left(x-1\right)\left(x^2-4x+4\right)=\left(x-1\right)\left(x-2\right)^2\)

THAM KHẢO

\(x^3-x^2-4x^2+8x-4\)

\(=x^3-4x^2-4x-x^2+4x-4\)

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

\(=\left(x-1\right)\left(x^2-4x+4\right)\)

\(=\left(x-1\right)\left(x-2\right)^2\)

x⁴ - 4x³ - 8x² + 8x 

 = x(x³ - 4x² - 8x + 8) 

= x[x³ + 8 - 4x(x + 2)] 

= x[(x + 2)(x² - 2x + 4) - 4x(x + 2)] 

= x(x + 2)(x² - 6x + 4)

= x(x + 2)(x² - 6x + 9 - 5) 

 = \(x\left(x+2\right)\left[\left(x-3\right)^2-5\right]=x\left(x+2\right)\left(x-3+\sqrt{5}\right)\left(x-3-\sqrt{5}\right)\)

\(x^4-4x^3-8x^2+8x\)

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

\(=x\left(x^3-6x^2+2x^2+4x-12x+8\right)\)

\(=x\left[\left(x^3-6x^2+4x\right)+\left(2x^2-12x+8\right)\right]\)

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

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

\(=x\left[\left(x-3\right)^2-\left(\sqrt{5}\right)^2\right]\left(x+2\right)\)

\(=x\left(x-3-\sqrt{5}\right)\left(x-3+\sqrt{5}\right)\left(x+2\right)\)

mình biết nội quy rồi nên đưng đăng nội quy

ai chơi bang bang 2 kết bạn với mình

mình có nick có 54k vàng đang góp mua pika 

ai kết bạn mình cho

bạn làm theo cách này nhen

\(\left(4x+1\right)\left(4x-3\right)\left(2x-3\right)\left(8x+8\right)-130=\left(16x^2-8x-3\right)\left(16x-8x-24\right)-130\)

đặt \(16x^2-8x-3=y< =>y\left(y-21\right)-130=y^2-21y-130=y^2-2.y.\frac{21}{2}+\left(\frac{21}{2}\right)^2-\left(\frac{21}{2}\right)^2-130=\left(y-\frac{21}{2}\right)^2-240,25=\)

\(=\left(y-\frac{21}{2}\right)^2-15,5^2=\left(y-26\right)\left(y+12\right)\)

có chõ nào sai hay  bạn không hiểu thì cũng đừng trách nhen 

\(1,\\ 1,=15\left(x+y\right)\\ 2,=4\left(2x-3y\right)\\ 3,=x\left(y-1\right)\\ 4,=2x\left(2x-3\right)\\ 2,\\ 1,=\left(x+y\right)\left(2-5a\right)\\ 2,=\left(x-5\right)\left(a^2-3\right)\\ 3,=\left(a-b\right)\left(4x+6xy\right)=2x\left(2+3y\right)\left(a-b\right)\\ 4,=\left(x-1\right)\left(3x+5\right)\\ 3,\\ A=13\left(87+12+1\right)=13\cdot100=1300\\ B=\left(x-3\right)\left(2x+y\right)=\left(13-3\right)\left(26+4\right)=10\cdot30=300\\ 4,\\ 1,\Rightarrow\left(x-5\right)\left(x-2\right)=0\Rightarrow\left[{}\begin{matrix}x=2\\x=5\end{matrix}\right.\\ 2,\Rightarrow\left(x-7\right)\left(x+2\right)=0\Rightarrow\left[{}\begin{matrix}x=7\\x=-2\end{matrix}\right.\\ 3,\Rightarrow\left(3x-1\right)\left(x-4\right)=0\Rightarrow\left[{}\begin{matrix}x=\dfrac{1}{3}\\x=4\end{matrix}\right.\\ 4,\Rightarrow\left(2x+3\right)\left(2x-1\right)=0\\ \Rightarrow\left[{}\begin{matrix}x=-\dfrac{3}{2}\\x=\dfrac{1}{2}\end{matrix}\right.\)

x^3- 4x^2-8x+8

= (x+2)(x^2-6x+4)

nha bạn chúc bạn học tốt nha 

x³ -4x² - 8x+8

=(x³ +8) - (4x² +8x)

= (x³ + 2³) - 4x(x +2)

=(x+2)(x² - 2x + 4) - 4x(x+2)

=(x+2)(x² -2x+4 -4x)

=(x+2)(x² -6x +4)

x³ - 4x² - 8x + 8

= x³ - 6x² + 2x² + 4x - 12x + 8

= (x³ - 6x² + 4x) + (2x² - 12x + 8)

= x(x² - 6x + 4) + 2(x² - 6x + 4)

= (x² - 6x + 4)(x + 2)

= [(x - 3)^2 - (√5)²](x + 2)

= (x - 3 - √5)(x - 3 + √5)(x + 2)

a. \(=4x^3-12x^2-x^2+3x+6x-18=\left(x-3\right)\left(4x^2-x+6\right)\)

b.  \(=-x^3+x^2-7x^2+7x-x+1=\left(x-1\right)\left(-x^2-7x-1\right)\)

c.  \(=x^3+2x^2-6x^2-12x+4x+8=\left(x+2\right)\left(x^2-6x+4\right)\)

x⁴+8x³+15x²-4x-2

= (x⁴+4x³+x²)+(4x³+16x²+4x)-(2x²+8x+2)

= x².(x²+4x+1)+4x.(x²+4x+1) -2(x²+4x+1)

= (x²+4x+1).(x²+4x-2)

ai h minh minh h lai cho