eastbryson
Answered

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Factor completely. x2 - 400 (x + 20) (x - 20) 0 (x + 4)(x + 100) 0 (x + 25)(x - 16) (x - 50) (x +8) plz​

Sagot :

[tex]\\ \sf\ast\Rrightarrow x^2-400[/tex]

[tex]\\ \sf\ast\Rrightarrow (x)^2-(20)^2[/tex]

  • a^2-b^2=(a+b)(a-b)

[tex]\\ \sf\ast\Rrightarrow (x+20)(x-20)[/tex]

aniilsah555

Step-by-step explanation:

  • x²-400
  • (x)²-(20)²

By the formula, [a²-b²=(a+b)(a-b)]

  • (x+20)(x-20)

Hence, first option is correct

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