polynomials formula class 9

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STUDY TALKS9-12

MATHS FORMULAS CLASS 9 {POLYNOMIALS}

S.NO FORMULAS
1. {a+b}2=a2+b2+2ab
2. {a-b}2=a2+b2-2ab
3. {a+b}3=a3+b3+3ab{a+b}
4. {a-b}3=a3-b3-3ab{a-b}
5. a2-b2={a+b}{a-b}
6. {x+a}{x+b}=x2+{a+b}x+ab
7. a3-b3={a-b}{a2+b2+ab}
8. a3+b3={a+b}{a2+b2-ab}
9. {a+b+c}2=a2+b2+c2+2ab+2bc+2ca
10. a3+b3+c3-3abc={a+b+c}{a2+b2+c2-ab-bc-ca}
Location: India

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