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Lorico [155]
3 years ago
12

If using the method of completing the square to solve the quadratic equation

Mathematics
1 answer:
zheka24 [161]3 years ago
8 0

Answer: 25

Step-by-step explanation: The number that is added to both sides is the number that is needed to create a perfect square trinomial.

The question is, what is that number?

Well, it comes from a formula. The number that is added to both sides always comes from half the coefficient of the middle term squared.

So half of -10 squared or -5 squared which is 25.

So 25 is added to both sides.

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M−2 over 4 =5 over 20
Ne4ueva [31]
m=3
Plug it in and it should work
3-2 =1 over 4 which is the same as 5 over 20 because both as a percentage equal 25% or 1/4 or 0.25 if you put it in a calculator as calculators provide decimal answers
5 0
2 years ago
What is 2×2hhhhggggggggggggggg
TiliK225 [7]

Answer:

2*2h4g15

Step-by-step explanation:

count how many "g"s there are and same with "h"

5 0
2 years ago
7=5y - 13 - y<br> Pls answer fast
Agata [3.3K]
20 = 4 y
Y =5
Hope this helps
8 0
2 years ago
Read 2 more answers
Pls pls pls answer! I will mark brainliest!!!! tysm<br> xy = 72<br> (x + 2)(y - 4) = 128
zheka24 [161]

Answer:

x=2 and y=36

Step-by-step explanation:

you have two equations

1) xy=72 and 2) (x+2)(y-4)=128

solve for one of the variables in equation 2), lets do y

(x+2)(y-4)=128, divide by (x+2) to both sides and add 4 to isolate variable y

therefore, y=(128/(x+2))+4

then plug in y into equation 1)

so x(our new y)=72

x( 128/(x+2) +4 )=72

distribute the x so you will get

(128/(x+2))x +4x=72

we are now solving for x, so isolate the x by subtracting 4x and multiplying by (x+2) to get

128x=(x+2)(72-4x)

multiply by distribution and combine like terms

-4x^2 -64x +144 =0

solve for x by quadratic formula, you'll get x=2 or x=-18

substitute back into equation 1), (2)(y)=72, solve for y to get 36

then you can check by substituting back into equation 2)

(2+2)(36-4)=128

(4)(32)=128, 128=128

6 0
3 years ago
Mike paid $18.00 before taxes for 5 photo albums. His sister wants to buy two of the same type of album. What amount should she
Natalija [7]
She should expect to pay $7.20 
4 0
3 years ago
Read 2 more answers
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