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factorise x2 + 2x-15

Sagot :

sadness584

[tex]\large\bigstar~\fbox{\sc Answer}[/tex]

▸ (x + 5)(x - 3)

[tex]\large\bigstar~\fbox{\sc Steps}[/tex]

We want to factorize the following:

  • [tex]\sf x^2+2x-15[/tex]

Our answer should look like this:

(x + __)(x + __)

First, let's think of two numbers that :

  • add to 2
  • multiply to 15

↠ These numbers are 5 and -3.

Next we write these numbers in the blanks:

(x + 5)(x - 3)

>>> Therefore, our answer is: (x + 5)(x - 3).

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