Which equation reveals the minimum or maximum value of f(x) without changing the form of the equation? f(x) = (x - 1)(x-1)
f(x)=x2 - x - x+1
f(x) = (x-1)2+2
f(x) = x2 – 2x+1

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