اتحاد (a-b)(a b)

we used Cartesian coordinate 2 dimensions and divide surface into four different positive and negative areas. areas number 1 and 3 are positive and area 2 and 4 are negative. for identity a^2 minus b^2 will locate in areas number first and number fourth. positive and negative ares in order we will understand (a+b)(a-b) in visual and tangible for learning and understanding

• #تحصیلات_و_یادگیری
• #اتحاد
• #ریاضی
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