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dimaraw [331]
3 years ago
15

See the attached file How do you answer it?

Mathematics
2 answers:
Oksanka [162]3 years ago
8 0
147 divided by 2 then divid that answer by 3
SCORPION-xisa [38]3 years ago
3 0
I think is <span> x = 7 or<span> x = -7

</span></span><span>Equation at the end of step  1  :</span><span> 3x2 - 147 = 0 </span><span>Step  2  :</span><span>Step  3  :</span>Pulling out like terms :

<span> 3.1 </span>    Pull out like factors :

  <span> 3x2 - 147</span>  =  <span> 3 • (x2 - 49)</span> 

Trying to factor as a Difference of Squares :

<span> 3.2 </span>     Factoring: <span> x2 - 49</span> 

Theory : A difference of two perfect squares, <span> A2 - B2  </span>can be factored into <span> (A+B) • (A-B)

</span>Proof :<span>  (A+B) • (A-B) =
         A2 - AB + BA - B2 =
         A2 <span>- AB + AB </span>- B2 = 
        <span> A2 - B2</span>

</span>Note : <span> <span>AB = BA </span></span>is the commutative property of multiplication. 

Note : <span> <span>- AB + AB </span></span>equals zero and is therefore eliminated from the expression.

Check : 49 is the square of 7
Check : <span> x2  </span>is the square of <span> x1 </span>

Factorization is :       (x + 7)  •  (x - 7) 

<span>Equation at the end of step  3  :</span><span> 3 • (x + 7) • (x - 7) = 0</span>
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