Answer: x = 7 or x = -8
x² + x - 56 = 0
⇔ x² + 8x - 7x - 56 = 0
⇔ x(x + 8) - 7(x + 8) = 0
⇔ (x - 7)(x + 8) = 0
⇔ x - 7 = 0
or x + 8 = 0
⇔ x = 7 or x = -8
Step-by-step explanation:
The answer is 4/6 which can be reduced to 2/3.
Let's take a peek of each term, to be specific, the exponent of the variables only, to see what degree each term is

so...which term has the highest degree? well, that one, is the degree of the polynomial