If (x+y)=8 and (x-y)=6, what is the value of xy?

Created: 3 years ago | Updated: 1 year ago

Updated: 1 year ago

Combined Bank (সমন্বিত ব্যাংক) সমন্বিত ৮ ব্যাংক | অফিসার | 21-01-2022 গণিত দ্বিঘাত সমীকরণ (Quadratic equation)

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দেযা আছে,

$x + y = 8, x - y = 6 x y = (\frac{x + y}{2})^{2} - (\frac{x - y}{2})^{2} = (\frac{8}{2})^{2} - (\frac{6}{2})^{2} = \frac{64}{4} - \frac{36}{4} = \frac{64 - 36}{4} = \frac{28}{4} = 7$

3 years ago

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If (x+y)=8 and (x-y)=6, what is the value of xy?

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