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Blababa [14]
2 years ago
8

Will give brainliest... Please I need this answer so badly

Mathematics
1 answer:
m_a_m_a [10]2 years ago
8 0
(6 - x) * (6 + x) - ( (2 - x) * (2 + x) ) =

6^2 - x^2 - ( 2^2 - x^2 ) =

36 - x^2 - ( 4 - x^2 ) =

36 - x^2 - 4 + x^2 =

36 - 4 =

32 square feet
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Solve the quadratic equation by completing the square.
Step2247 [10]

Answer:

x1, x2 = 4.74 , -2.74

Step-by-step explanation:

To find the roots of a quadratic function we have to use the bhaskara formula

ax^2 + bx + c

x^2 - 2x - 13

a = 1     b = -2    c = -13

x1 = (-b + √ b^2 - 4ac)/2a

x2 =(-b - √ b^2 - 4ac)/2a

x1 = (2 + √ (2^2 - 4 * 1 * (-13)))/2 * 1

x1 = (2 + √ (4 + 52)) / 2

x1 = (2 + √ 56 ) / 2

x1 = (2 + 7.48) / 2

x1 = 9.48 / 2

x1 = 4.74

x2 = (2 - √ (2^2 - 4 * 1 * (-13)))/2 * 1

x2 = (2 - √ (4 + 52)) / 2

x2 = (2 - √ 56 ) / 2

x2 = (2 - 7.48) / 2

x2 = -5.48 / 2

x2 = -2.74

6 0
3 years ago
Help with my math READ IT CARFULLY
Irina-Kira [14]

Sci = π . 2 . 2 = 12,56 ⇒ 1/2 Sc1 = 1/2 . 12,56 = 6,28

Srec = 6 . 4 = 24

S= 6,28 + 24 = 30,28

the answer is 30,28

ok done. Thank to me :>

8 0
2 years ago
Can u guys please help a poor soul <br> 1/root 5 - root 3
Stolb23 [73]

Answer:

1/√5+√3= 1/√5+√3×√5-√3/√5-√3 = √5-√3/(√5)^2-(√3)^2 {(a+b)(a-b)= (a)^2-(b)^2} =√5-√3/5-3 =√5-√3/2 ans... Do you satisfied to my given answer

Step-by-step explanation:

3 0
2 years ago
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Meta-analysis involves:
Hatshy [7]

Answer: b. finding all studies published on a topic, calculating the effect size for each of those studies, and averaging the effect sizes together to find the average size of the effect across all studies.

Step-by-step explanation:

7 0
3 years ago
Which of the following is the expansion of (2x – y) 2?
maksim [4K]
The answer is 
4x - 2y
8 0
3 years ago
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