Question

Can someone give me a step by step explanation because my teacher doesn’t teach us anything? :(

Answer 1

(7x^2 -1)(x - 2).

Explanation:

7x^3 - 14x^2 - x + 2

We can factor this by grouping - that is factoring the first 2 terms and the last 2:

= 7x^2(x - 2) - 1(x - 2) <-- the x - 2 is common to both parts so we have:

(7x^2 -1)(x - 2).