Help and ill give brainlist

How do i get my dad to stop making me gargle his pickle i want my mom to gargle my pickle not my dads

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

John used linear combination to solve the system of equations shown. he did so by multiplying the first equation by -3 and the second equation by another number to eliminate the x-terms. what number did jonas multiply the second equation by? 4x-6y=23x+5y=11