Câu trong ảnh làm như nào các bạn ơi... 11. Phân tích các đa thức sau thành nhân tử:,$b)~3x(x-7)+2xy-14y)$ $b)~82x-5y^2+5x-6x^3$,$0.~6x^2-12x+6)$ $4)~-20x^2+60y-6y^2.$,$e)~2x^2-16^4.$ $0.3x^2-48.$,$ extcircled{B)}~x^2-x^2+4x+4y^2.$ $hi~x^2-x^2+2x-6x+y^2-9$,Phân tích các đa thức sau thành nhân tử:,$a)~x^2-12x+20.$ $(6)~2x^2-x-2x.$,$ax^2-x^2+x-1i$ $4.~2x^2-5x-6.$,$\Leftrightarrow4y^4+1.$ $a.~x^2+x^2+x^2.$,$m(x^2+x^2-5x^2+x)+8.$ $b)~a^2+2a^2-2a+1y^2-1$,$9)~x^2+4xy+4y^2-8x+2y+3;9x(x+1)(x+2)x+2y-9)$,Tìm x biết:,$(a)~4x^2+7x-0)$ $ extcircled{G)}~9x-6x^2=0.$,$0.~(x-1)^2-x(x-2)^2=-1)$ $d)~20x-5(x+5)+(x-6^2+16^2+16^2$,$(6)~x^2-x-2=0;$ $(x)=x^2+5x-12=0$

Question

Câu trong ảnh làm như nào các bạn ơi... 11. Phân tích các đa thức sau thành nhân tử:,$b)~3x(x-7)+2xy-14y)$ $b)~82x-5y^2+5x-6x^3$,$0.~6x^2-12x+6)$ $4)~-20x^2+60y-6y^2.$,$e)~2x^2-16^4.$ $0.3x^2-48.$,$	extcircled{B)}~x^2-x^2+4x+4y^2.$ $hi~x^2-x^2+2x-6x+y^2-9$,Phân tích các đa thức sau thành nhân tử:,$a)~x^2-12x+20.$ $(6)~2x^2-x-2x.$,$ax^2-x^2+x-1i$ $4.~2x^2-5x-6.$,$\Leftrightarrow4y^4+1.$ $a.~x^2+x^2+x^2.$,$m(x^2+x^2-5x^2+x)+8.$ $b)~a^2+2a^2-2a+1y^2-1$,$9)~x^2+4xy+4y^2-8x+2y+3;9x(x+1)(x+2)x+2y-9)$,Tìm x biết:,$(a)~4x^2+7x-0)$ $	extcircled{G)}~9x-6x^2=0.$,$0.~(x-1)^2-x(x-2)^2=-1)$ $d)~20x-5(x+5)+(x-6^2+16^2+16^2$,$(6)~x^2-x-2=0;$ $(x)=x^2+5x-12=0$

Accepted Answer

{"userId":5430500,"userName":"Mai Phương"}

13.

a)

$$4x^2+7x=0$$

$$x\left(4x+7 ight)=0$$

$$\left[\begin{matrix}x=0 \ 4x+7=0\end{matrix} ight.$$

$$\left[\begin{matrix}x=0 \ x=-\frac{7}{4}\end{matrix} ight.$$

b)

$$48x-6x^4=0$$

$$6x\left(8-x^3 ight)=0$$

$$6x\left(2-x ight)\left(4+2x+x^2 ight)=0$$

$$\left[\begin{matrix}6x=0 \ 2-x=0 \ 4+2x+x^2=0\end{matrix} ight.$$

$$\left[\begin{matrix}x=0 \ x=2 \ \left(x+1 ight)^2+3=0\end{matrix} ight.$$

$$\left[\begin{matrix}x=0 \ x=2 \ \left(x+1 ight)^2=-3\left(vôlí ight)\end{matrix} ight.$$

c)

$$\left(x-1 ight)^3-x\left(x-2 ight)^2=-1$$

$$\left(x^3-3x^2+3x-1 ight)-x\left(x^2-4x+4 ight)=-1$$

$$x^3-3x^2+3x-1-x^3+4x^2-4x=-1$$

$$x^2-x-1=-1$$

$$x^2-x=0$$

$$x\left(x-1 ight)=0$$

$$\left[\begin{matrix}x=0 \ x-1=0\end{matrix} ight.$$

$$\left[\begin{matrix}x=0 \ x=1\end{matrix} ight.$$

d)

$$2\left(x-5 ight)\left(x+5 ight)+\left(x-6 ight)^2+14=0$$

$$2\left(x^2-25 ight)+\left(x^2-12x+36 ight)+14=0$$

$$2x^2-50+x^2-12x+50=0$$

$$3x^2-12x=0$$

$$3x\left(x-4 ight)=0$$

$$\left[\begin{matrix}3x=0 \ x-4=0\end{matrix} ight.$$

$$\left[\begin{matrix}x=0 \ x=4\end{matrix} ight.$$

e)

$$x^2-x-2=0$$

$$\left(x-2 ight)\left(x+1 ight)=0$$

$$\left[\begin{matrix}x-2=0 \ x+1=0\end{matrix} ight.$$

$$\left[\begin{matrix}x=2 \ x=-1\end{matrix} ight.$$

f)

$$3x^2+5x-12=0$$

$$\left(x+3 ight)\left(3x-4 ight)=0$$

$$\left[\begin{matrix}x+3=0 \ 3x-4=0\end{matrix} ight.$$

$$\left[\begin{matrix}x=-3 \ x=\frac{4}{3}\end{matrix} ight.$$.