Question

2x^4-162

Answer 1

what you mean

Answer 2

\[2x^4-162\]\[2(x^4-81)\]\[2(x^4-3^4)\]

Answer 3

\[a^4-b^4=(a^2+b^2)(a^2-b^2)=(a^2+b^2)(a-b)(a-b)\]

Answer 4

\[x^4-3^4=(x^2+3^2)(x+3)(x-3)~~=~~\color{red} {(x^2+9)(x+3)(x-3)}\]

Answer 5

that's it, you just need to know these formulas how to factor a^4-b^4 and etc.