hannah1571 hannah1571
  • 08-02-2019
  • Mathematics
contestada

What is the completely factored from of 9x2+24x+16
(3x+8)(3x+2)
(3x+4)(3x+4)
(9x+8)(x+2)
(9x+4)(x+4)

Respuesta :

isyllus
isyllus isyllus
  • 08-02-2019

Answer:

(3x+4)(3x+4) is factor of given expression.

B is correct.

Step-by-step explanation:

We are given an expression [tex]9x^2+24x+16[/tex]

Formula: [tex]a^2+2ab+b^2=(a+b)^2[/tex]

First we write each term as perfect square as formula.

[tex]\Rightarrow 9x^2+24x+16[/tex]

[tex]\Rightarrow (3x)^2+2\cdot 3x\cdot 4+4^2[/tex]

Using formula , a=3x and b=4

[tex]\therefore (3x)^2+2\cdot 3x\cdot 4+4^2=(3x+4)^2[/tex]

Now we write same number two times.

Hence, (3x+4)(3x+4) is factor of given expression.

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