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nexus9112 [7]
3 years ago
10

Please help !! Which of the following are solutions to the equation below? check all that apply

Mathematics
2 answers:
Gala2k [10]3 years ago
7 0
I thike so i would -4 must help u a lot
notsponge [240]3 years ago
3 0
The solutions are:  x = -5, 2 ; 
           which are Answer choices:  [E] and [F] .
<span>_________________________________________________</span>
Given:
_________________________
     x²  + 4x − 9 = x + 1  ;
___________________________
Simplify, by subtracting "x" and "1" from EACH SIDE of the equation:
______________________________________________________
    x²  + 4x − 9 − x − 1 = x + 1 − x − 1 ;
__________________________________________
to get:
___________________________________________________
    x²  + 3x − 10  = 0 ;
________________________
Now, we can factor the left-hand side of the equation:
____________________________________________
      x²  + 3x − 10 = (x + 5) (x − 2); and rewrite the equation as:
________________________________________________
  (x + 5) (x − 2) = 0 ;
________________________________________________
The solutions are:  x = -5, 2 ; 
           which are Answer choices:  [E] and [F] .
_________________________________________________
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4(a + 2) = 14 – 2(3 – 2a)<br><br> –2<br><br><br> –1<br><br><br> no solution<br><br> all real numbers
Ray Of Light [21]

All real numbers.

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Step-by-step explanation:

Distributive property: a(b+c)=ab+ac

Expand: 4(a+2)=4a+8

Expand again: 14-2(3-2a)=4a+8

4a+8=4a+8

You subtract by 8 from both sides of an equation.

4a+8-8=4a+8-8

Simplify.

4a=4a

Then, subtract by 4a from both sides of an equation.

4a-4a=4a-4a

Finally, simplify.

4a-4a=0

0=0

True

All real numbers is the final answer.

Hope this helps you!

Have a nice day! :)

4 0
3 years ago
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