Extended Distributive Property: Complete the missing number

Complete the missing element

$-(2y+z)(z-?)=4z+8y-z^2-2yz$

$4$

Complete the missing element

$(3x-8)(-4+?)=-3x^2-4x+32$

$-x$

Complete the missing element

$(-4-y)(-2x-?)=8x-16-4y+2xy$

$-4$

Complete the missing element

$(a+?)(-2a+4)=-2a^2-20a+48$

$12$

Complete the missing element

$(a+4)(?+b)=ac+ab+4c+4b$

$c$

Complete the missing element

$(a+?)(a+3)=a^2+3a+2ab+6b$

$2b$

Complete the missing element

$(m+n)(4+?)=n^2+mn+4m+4n$

$n$

Complete the missing element

$(x+2)(?-4)=a+2\frac{a}{x}-4x-8$

$\frac{a}{x}$

Complete the missing element

$(?x+8)(a-9)=\frac{1}{3}xa-3x+8a-72$

$\frac{1}{3}$

Complete the missing element

$(x+?)(x-8)=x^2-5x-24$

$3$

Fill in the missing number

$(3x+4)(5+?)=15x+3xy+4y+20$

$y$

Fill in the missing number

$(-5+2y)(y-?)=2y^2-9y+10$

$2$

Fill in the missing number

$a^2+7a+12=(a+?)(4+a)$

$3$

Fill in the missing number

$(a+2)(?a+5)=2a^2+9a+10$

$2$

Fill in the missing number

$(x-4y)(2x+?)=2x^2-12y-8xy+3$

$\frac{-12y+3}{x-4y}$

Fills in the missing element

$(2a+b)(3b-?)=6ab+5a+2b$

No adequate solution

$\left(x-?\right)\left(x-?\right)=x^2-x+0.25$

$\left(x-\frac{1}{2}\right)\left(x-\frac{1}{2}\right)$

$(x+?)(x-?)=x^2-3x-40$

$\left(x+5\right)\left(x-8\right)$

$(x+?)(x+?)=x^2+7x+10$

$\left(x+5\right)\left(x+2\right)$

$(x-?)(x+?)=x^2+x-12$

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