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Temka [501]
3 years ago
11

Need Help BadlyWhat is the solution

Mathematics
1 answer:
Kamila [148]3 years ago
5 0
Sqrt(1-3x)=x+3
[sqrt(1-3x)]^2=(x+3)^2
1-3x=(x+3)(x+3)
1-3x=x^2+6x+9
-3x=x^2+6x+8
0=x^2+9x+8

The answers are -1 and -8 BUT, we have to plug them back into the original equation to make sure we don't get a negative under the square root sign.

After doing this, we realize that only -1 works, so the answer is x=-1

Sorry that this took forever to answer. I was thinking of a good way to explain this, and if you need any further explanation, message me:)

Best wishes:)


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Which expression is equivalent to 3a2 + 6a + 5a2?
Vaselesa [24]
\begin{gathered} 3a^2+6a+5a^2 \\ \text{collect like terms} \\ 3a^2+5a^2+6a \\ 8a^2+6a \end{gathered}

4 0
1 year ago
Please help me its very urgent!​
Harlamova29_29 [7]

Answer:

A. One solution

Step-by-step explanation:

A. One solution

The answer is -3

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a contractor needs to cut a piece of glass to fit a square window. the area of the window is 16 ft^2. find the length of the sid
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Area = 16 ft.²

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A2-b2 ÷5a-5b factorise​
katrin2010 [14]

Answer:

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "b2"   was replaced by   "b^2".  1 more similar replacement(s).

STEP

1

:

           5a + 5b

Simplify   ———————

           a2 - b2

STEP

2

:

Pulling out like terms

2.1     Pull out like factors :

  5a + 5b  =   5 • (a + b)  

Trying to factor as a Difference of Squares:

2.2      Factoring:  a2 - b2  

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

Proof :  (A+B) • (A-B) =

        A2 - AB + BA - B2 =

        A2 - AB + AB - B2 =

        A2 - B2

Note :  AB = BA is the commutative property of multiplication.

Note :  - AB + AB equals zero and is therefore eliminated from the expression.

Check :  a2  is the square of  a1  

Check :  b2  is the square of  b1  

Factorization is :       (a + b)  •  (a - b)  

Canceling Out :

2.3    Cancel out  (a + b)  which appears on both sides of the fraction line.

Final result :

   5 / a -b  

 

 

Step-by-step explanation:

3 0
3 years ago
The Question is above ⤴​
melomori [17]

Answer:

i believe its A

Step-by-step explanation:

4 0
3 years ago
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