If x + y = 7 and x - y = 3, then x2 -y2= - Prothom Sir

If x + y = 7 and x - y = 3, then

x^{2} - y^{2} =

Created: 7 months ago | Updated: 1 month ago

- 4

৪

১০

২১

Job Solution Combined Bank (সমন্বিত ব্যাংক) সমন্বিত ৯ ব্যাংক | 07-01-2022 গণিত

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x^2-y^2 = (x + y)(x - y)

substituting each of (x + y) and (x - y) with 7 and 3, respectively as per above, then

x^2-y^2 = 7*3 = 21

1 year ago

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