Answer:
(11x - 9y) (121x² + 99xy + 81)
Step-by-step explanation:
Difference of cubes
∛1331x³ = 11x = a
∛729y³ = 9y = b
(a³ + b³) = (a + b) (a² - ab + b²)
(a³ - b³) = (a - b) (a² + ab + b)
(1331x³ - 729y³) = (11x - 9y) (121x² + 99xy + 81)
Answer: x = ¹/₂ ± √⁸¹
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2
Step-by-step explanation:
First write out the equation
x² - x - 20
Now we now write the equation by equating to 0
x² - x - 20 = 0
We now move 20 to the other side of the equation. So
x² - x = 20,
We now add to both side of the equation square of the half the coefficient of the (x) and not (x²) which is (1) . So, the equation now becomes
x² - x + ( ¹/₂ )² = 20 + ( ¹/₂ )²
x² - ( ¹/₂ )² = 20 + ¹/₄
( x - ¹/₂ )² = 20 + ¹/₄, we now resolve the right hand side expression into fraction
( x - ¹/₂ )² = ⁸¹/₄ when the LCM is made 4
Taking the square root of both side to remove the square,we now have
x - ¹/₂ = √⁸¹/₄
x - ¹/₂ = √⁸¹/₂
Therefore,
x = ¹/₂ ± √⁸¹
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2
Answer:
332
Step-by-step explanation:
332 divided by 4 + 75 is 158
Answer: Option 1
<u>Step-by-step explanation:</u>
Option 1 has a greater area than option 2.