(x - 4)(x + 4)

(x - 4)(x - 4)

(x + 4)(x + 4)

(x - 8)(x + 2)

(x-2)(x-1)

(x-2)(x+1)

(x+2)(x-1)

(x+2)(x+1)

$$-7x+1$$  

$$x^2-7x$$  

$$x-7x^2+0$$  

$$x^2+7x+0$$  

$$4x^2-20=4\left(x^2-5\right)$$

$$3c^2-12c=3c\left(c-4\right)$$

$$5y^2-10y=5y\left(y+2\right)$$

$$14w^2-21w=7w\left(2w-3\right)$$

$$9y\left(y-3\right)$$  

$$27\left(y^2-3y\right)$$  

$$3y\left(3y^2-9\right)$$  

$$3y\left(3y-9y\right)$$  

$$a^2\left(5\right)$$  

$$5\left(a^2+a\right)$$  

$$a\left(5a+a\right)$$  

$$a\left(5a+1\right)$$  

$$\left(x-3\right)\left(x-2\right)$$  

$$\left(x-3\right)\left(x-3\right)$$  

$$\left(x-9\right)\left(x-1\right)$$  

$$\left(x-3\right)\left(x+3\right)$$  

$$\left(x-4\right)\left(x+4\right)$$  

$$\left(x+2\right)\left(x-2\right)$$  

$$\left(x+4\right)^2$$  

$$\left(x+2\right)^2$$  

$$\left(x-4\right)\left(x+4\right)$$  

$$\left(x+16\right)\left(x-16\right)$$

$$\left(x-4\right)^2$$  

$$\left(x-16\right)^2$$  

$$3x^2-10x+8$$  

$$6x^2+11x-7$$  

$$x^2-3x-40$$  

$$x^2-2x-15$$  

$$\left(x+5\right)^2$$  

$$\left(x+25\right)^2$$  

$$\left(2x+5\right)^2$$  

$$\left(4x+5\right)^2$$  

$$\left(x-6\right)\left(x+2\right)$$  

$$\left(x+3\right)\left(x-4\right)$$  

$$\left(x-2\right)\left(x+6\right)$$  

$$\left(x-3\right)\left(x-4\right)$$  

(x + 8)(x - 9)

(x + 18)(x - 4)

(x + 12)(x - 6)

(x + 9)(x - 8)

(x+6)(x-4)

(x+6)(x-4)

(3x+2)(x-1)

(3x-1)(x+2)

(x+10)(x-12)

(x+10)(x+12)

(x-12)(x-12)

 (x-11)(x-11)

(15x-1)(x-24)

(5x-2)(3x+1)

(15x+12)(x+2)

(5x+6)(3x-4)

5x² – 25x + 25

25x² – 50x + 25

5x² + 25x + 25

25x² + 50x + 25

$$\left(x-3\right)\left(x+6\right)$$  

$$\left(x-3\right)\left(x+9\right)$$  

$$\left(x+3\right)\left(x-6\right)$$  

$$\left(x+3\right)\left(x-9\right)$$  

$$3\left(x^2-2x\right)$$  

$$x\left(3x-2\right)$$  

$$3x\left(x-2\right)$$  

$$3x\left(3x-2\right)$$  

$$10x+4=2\left(5x+2\right)$$

$$12xz-16z\ =\ 2z\left(6x-8\right)$$

$$5y^2-20y\ =\ 5y\left(y-4\right)$$

$$x^2+13x=x\left(x+13\right)$$