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fredd [130]
3 years ago
11

The method of completing the square was used to solve the equation 2x^2 - 12x + 6 =0 which equation is a correct step when using

this method ?
1- (x - 3 )^2 =6
2- (x - 3 )^2 =-6
3- (x - 3 )^2 =3
4- (x - 3 )^2 = -3
Mathematics
1 answer:
trapecia [35]3 years ago
6 0
The equation we are looking at would have to be divided by 2 first.
x²-6x+3
When looking at that, I can tell that 1 may be the possible answer since you would have to subtract 6 from both sides. That would leave a 3. Let's check.
(x-3)(x-3)
x²-6x+9=6
Now subtract 6 from both sides.
x²-6x+3=0
So, 1- (x-3)²=6 would be used.
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A number is divided by 3. That quotient is increased by 12. The result is 46. Find the number.
anzhelika [568]

Let the number be x.

x/3 + 12 = 46

Subtract 12 from both sides and you will get:

x/3 = 34

Multiply both sides by 3:

x = 102

3 0
3 years ago
Solve for k: -2k = k - 7 - 8 and explain in number form
Kamila [148]

Answer:

k = 5

Step-by-step explanation:

-2k = k - 7 - 8

Combine like terms

-2k = k - 15

add 15 to both sides

-2k + 15 = k

Add 2k to both sides

15 = 3k

Divide both sides by 3

k=5

Hope this helps!

7 0
3 years ago
3x+4=20 solve using the box method
Sonbull [250]

Answer:

Exact form:

x= 16/3

Decimal form:

x=5.3

Mixed form:

x= 5 1/3

Step-by-step explanation:

Move all terms that don't contain x to the right side and solve.

4 0
3 years ago
Read 2 more answers
Subtract (r - 3q + 5p) - (-4r - 3q - 8p)
Alex787 [66]

Answer: ok so Let's simplify step-by-step.

r−3q+5p−(−4r−3q−8p)

Distribute the Negative Sign:

=r−3q+5p+−1(−4r−3q−8p)

=r+−3q+5p+−1(−4r)+−1(−3q)+−1(−8p)

=r+−3q+5p+4r+3q+8p

Combine Like Terms:

=r+−3q+5p+4r+3q+8p

=(5p+8p)+(−3q+3q)+(r+4r)

=13p+5r

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
Pls help me with this !!!!! it is urgent
OLEGan [10]
The answer is 1A definitely
4 0
3 years ago
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