EizaN782133 EizaN782133
  • 28-10-2022
  • Mathematics
contestada

Factor the expression X² +4 x-21 o(x-3)(x+7) o(x-7)(x+3) • (x+2)(x - 11.5) o (x +11.5)(x-2)

Factor the expression X 4 x21 ox3x7 ox7x3 x2x 115 o x 115x2 class=

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AngeleeP565692 AngeleeP565692
  • 28-10-2022
Answer:

(x-3)(x+7)

Explanations:

The given expression is:

[tex]x^2+4x-21[/tex]

This can be factorised as shown below:

[tex]\begin{gathered} x^2-3x\text{ + 7x - 21} \\ x\text{ (x - 3) + 7 (x - 3)} \\ (x\text{ - 3 ) ( x + 7)} \end{gathered}[/tex]

The factorised expression is (x-3)(x+7)

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