Mathematics is easy for some, difficult for others. What is important is whether you like the subject or not! Cultivate a liking towards math, and you’ll be breezing through it in no time!
Here are several important identities which you may want to keep in mind while solving sums. They will help you out the most in Quadratic Equations, Ratio and Proportion, Trigonometry, etc.
(x + a) (x + b) = x2 + (a + b) x + ab
(a ± b)2 = a2 ± 2ab + b2
(a ± b)3 = a3 ± 3a2b + 3ab2 ± b3 OR (a ± b)3 = a3 ± b3 ± 3ab (a± b)
a2 − b2 = (a + b)(a − b)
a3 + b3 = (a + b)(a2 − ab + b2)
a3 − b3 = (a − b)(a2 + ab + b2)
(a + b + c)2 = a2 + b2 + c2 + 2ab + 2ac + 2bc
These are just the basic algebraic identities you may need in the chapters mentioned above.
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