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earnstyle [38]
4 years ago
5

X squared + 12 x + 3 = 7 solve by completing the square

Mathematics
2 answers:
GarryVolchara [31]4 years ago
5 0

ax^2 + bx + c

x^2 + 12x + 3 = 7

x^2 + 12x = 4

Take b, half it, then square it--

x^2 + 12x + 36 = 40

That equation becomes

(x+6)^2 = 40

+ 6 = ± (square root of 40)

= 0.324555

= −12.3246

Naddika [18.5K]4 years ago
5 0

Answer:

1/6?

Step-by-step explanation:

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Step-by-step explanation:

6 0
3 years ago
X^2 + 1/4 or 7 or 7/2 x + 49
wolverine [178]

Answer:

14

Step-by-step explanation:

Squaring a number (a+b) for example is a^2+2ab+b^2. So you square root x^2 and 49, you get x and seven respectively. you multiply them together and on top of that multiply the product by 2. so 7x*2 is 14x and ye

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3 years ago
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The difference of the square of a number and 4 is equal to 3 times that number. Find the positive solution.
liberstina [14]

Let the number be 'a':

The difference of the square of a number and 4

a^2 -4

is equal to 3 times that number.

= 3*a

a^2 -4 =3a

a^2 -3a -4=0

(a-4) (a+1)=0

solutions are: 4 and -1

8 0
3 years ago
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4.Find the length of the diagonal of a rectangle having dimensions 16 cm and 12 cm.
nignag [31]

Answer:

20 cm

Step-by-step explanation:

So from the problem we get that the two sides of the rctangle are 16 cm 12 cm which are base perpendicular of the right angle triangle. H = 20 cm. So the diagonal of the rectangle = 20 cm.

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