fyre fest 2

2024XSX,XSSxbox series S|X XGPXbox.
Win7
18 2014AI 2015.
15Win10 2014~2015CEOCEO
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2024 IIT 15 .
win10 shift win11bug ctrl+..
Windows 10 Microsoft Store ""
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Surface Pro 9surfacepro9 Surface Pro 9surfacepro9 .

2024XSX,XSSxbox series S|X XGPXbox.
Win7
18 2014AI 2015.
15Win10 2014~2015CEOCEO
!.
2024 IIT 15 .
win10 shift win11bug ctrl+..
Windows 10 Microsoft Store ""
.
Surface Pro 9surfacepro9 Surface Pro 9surfacepro9 .
5Question: Rationalize the denominator of $\displaystyle rac{3}{\sqrt{7} - \sqrt{2}}$.
To rationalize the denominator, we multiply both numerator and denominator by the conjugate of the denominator, which is $\sqrt{7} + \sqrt{2}$:
Now simplify the denominator using the identity $(a - b)(a + b) = a^2 - b^2$:
rac{3(\sqrt{7} + \sqrt{2})}{5}
oxed{rac{3(\sqrt{7} + \sqrt{2})}{5}}
Question: Expand the product $(2x - 3y)(x^2 + 4xy - 5y^2)$.
We apply the distributive property to expand the product:
2x(x^2 + 4xy - 5y^2) = 2x^3 + 8x^2y - 10xy^2
-3y(x^2 + 4xy - 5y^2) = -3x^2y - 12xy^2 + 15y^3
$2x^3$