Question

What is the factored form of the polynomial?

x2 − 12x + 27?

(x + 4)(x + 3)
(x − 4)(x + 3)
(x + 9)(x + 3)
(x − 9)(x − 3)

Answer 1

(x-9)(x-3), because -9 and -3 make a sum of -12 and a product of +27

Answer 2

Part of it is guessint and checking, but the most important part ia to understand the upsidedown rainbow addition and factors of 27