Physics formulas

(a + b)2= a2 + 2ab + b2

(a – b)2 = a2 – 2ab + b2

a2 – b2 = (a + b)(a – b)

a2 + b2 = (a + b)2 – 2ab or (a – b)2 + 2ab

(a + b + c)2 = a2 + b2 + c2 + 2(ab + bc +ac) or a2 + b2 + c2 + 2ab + 2bc + 2ca

(a – b – c)2 = a2 + b2 + c2 – 2(ab – bc +ac) or a2 + b2 + c2 – 2ab + 2bc – 2ca

(a + b)3 = a3 + b3 + 3ab(a + b) or a3 + 3a2b + 3ab2 + b3

(a – b)3 = a3 – b3 – 3ab(a – b) or a3 – 3a2b + 3ab2 – b3

a3 – b3 = (a – b)(a2 + ab + b2)

a3 + b3 = (a + b)(a2 – ab + b2)

a4 – b4 = (a2 – b2)(a2 + b2) or (a – b)(a + b)(a2 + b2)

a5 – b5 = (a – b)(a4 + a3b + a2b2 + ab3 + b4)

an + bn = (a + b)(an-1 – an-2b + an-3b2 … – abn-2 + bn-1)

pn = p.p.p…….n times

pn⋅ pm = pm+n

pn ⋅ qn = (p ⋅ q)n

pm/ pn = xm-n

pn / qn = (p / q)n

(pn)m = pn⋅m

pnm = p(nm)

p-n = 1 / pn

a0 = 1 where a ∈ R , a!=0