Question

${x}^{2} - x - k = (x + 3)(x - 4)$
​give me correct answer please

Answer 1

Explanation:

x²-x-k=(x+3)(x-4)

x²-x-k=x²-4x+3x-12

-x-k=-x-12

-k=-12

k=12

Follow me

Answer 2

It's simple

x²-x-k=x²-4x+3x-12

x²-x+k=x²-4x+3x-12x²-x++k=x²-x-12

so by comparing both sides we get

-k=-12

k=12