ষষ্ঠ শ্রেনী থেকে দশম শ্রেণী পর্যন্ত সকল গানিতিক সূত্র:
ষষ্ঠ শ্রেনী থেকে দশম শ্রেণী পর্যন্ত সকল গানিতিক সূত্র:
- (a + b) 2 = a2 + 2ab + b2
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(a + b) 2 = (a – b) 2 + 4ab
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(a – b) 2 = a2 – 2ab + b2
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(a – b) 2 = (a + b) 2 – 4ab
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a2 + b2 = (a + b) 2 – 2ab
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a2 + b2 = (a – b) 2 + 2ab
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a2 – b2 = (a + b) (a – b)
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2 (a2+b2) = (a + b) 2 + (a – b) 2
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(a + b + c) 2 = (a2 + b2 + c2) + 2 (ab + bc + ca)
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(a2 + b2 + c2) = (a + b + c) 2 – 2(ab + bc + ca)
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2 (ab + bc + ca) = (a + b + c) 2 – (a2 + b2 + c2)
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(a + b) 3 = a3 + 3a2b + 3ab2 + b3
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(a + b) 3 = a3 + b3 + 3ab (a + b)
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(a – b) 3 = a3 – 3a2b + 3ab2 – b3
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(a – b) 3= a3 – b3– 3ab (a – b)
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a3 + b3= (a + b) ( a2 – ab + b2)
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a3 + b3 = (a + b) 3 – 3ab (a + b)
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a3 – b3= (a – b) ( a2 +ab + b2)
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a3 – b3= (a – b) 3 + 3ab (a – b)
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(a + b + c) 3 = a3 + b3 + c3 + 3 (a + b) (b + c) (c + a)
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a3 + b3 + c3 – 3abc = (a + b + c) (a2 + b2+ c2 – ab – bc – ca)
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a3 + b3 + c3 – 3abc = (a + b + c) { (a – b) 2 + (b – c) 2 + (c – a) 2 }
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(x + a) (x + b) = x2 + (a + b) x + ab
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(x + a) (x – b) = x2 + (a – b) x – ab
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(x – a) (x + b) = x2 + (b – a) x – ab
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(x – a) (x – b) = x2 – (a + b) x + ab
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(x + p) (x + q) (x + r) = x3 + (p + q + r) x2 + (pq + qr + rp) x +pqr.
(অতি গুরুত্বপূর্ণ এই পোস্টটি share না করলে আর খুঁজে পাবেন না)
