Q:

(x2 + 4)(x2 - 4) please help

Accepted Solution

A:
([tex]x^{2}[/tex] + 4)([tex]x^{2}[/tex] - 4)To solve this question you must FOIL (First, Outside, Inside, Last) like soFirst: (x^2 + 4)(x^2 - 4) x^2 * x^2x^4Outside:(x^2 + 4)(x^2 - 4) x^2 * -4-4x^2Inside:(x^2 + 4)(x^2 - 4) 4 * x^24x^2Last:(x^2 + 4)(x^2 - 4) 4 * -4-16Now combine all the products of the FOIL together like so...x^4 - 4x^2 +4x^2 - 16Combine like terms:x^4 - 4x^2 +4x^2 - 16 - 4x^2 +4x^2 = 0x^4 - 16 <<<This is your answerHope this helped!~Just a girl in love with Shawn Mendes