Maths formula for class 8
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Algebraic Expansions:
1. (a + b)2 = a2 + 2ab + b2
2. (a - b)2 = a2 - 2ab + b2
3. (a + b) (a - b) = a2 - b2
4. (x + a)(x + b) = x2 + (a + b)x + ab
5. (x + a)(x - b) = x2 + (a - b)x - ab
6. (x - a)(x + b) = x2 + (b - a)x - ab
7. (x - a)(x - b) = x2 - (a + b)x + ab
8. (a + b)3 = a3 + b3 + 3ab(a + b)
9. (a - b)3 = a3 - b3 - 3ab (a - b)
10. (x + y + z)2 = x2 + y2 + z2 + 2xy + 2yz + 2xz
11. (x + y - z)2 = x2 + y2 + z2 + 2xy - 2yz - 2xz
12. (x - y + z)2 = x2 + y2 + z2 - 2xy - 2yz + 2xz
13. (x - y - z)2 = x2 + y2 + z2 - 2xy + 2yz - 2xz
Temperature Conversions :
ºC = 5959 ( ºF - 32 ) ºF = 9595 ( ºC + 32 )
Simple Interest = PTR100PTR100
Pythagorean Theorem:
a2 + b2 = c2

Laws of Exponents
Product Law: am*an = am+n
Quotient Law: = aman=am−naman=am−n, if m>n
= 1an−m1an−m ,if n>m
Power law: (am)n = amn
HOPE IT LIKES U
PLZ MARK IT AS BRAINIEST ANSWER
1. (a + b)2 = a2 + 2ab + b2
2. (a - b)2 = a2 - 2ab + b2
3. (a + b) (a - b) = a2 - b2
4. (x + a)(x + b) = x2 + (a + b)x + ab
5. (x + a)(x - b) = x2 + (a - b)x - ab
6. (x - a)(x + b) = x2 + (b - a)x - ab
7. (x - a)(x - b) = x2 - (a + b)x + ab
8. (a + b)3 = a3 + b3 + 3ab(a + b)
9. (a - b)3 = a3 - b3 - 3ab (a - b)
10. (x + y + z)2 = x2 + y2 + z2 + 2xy + 2yz + 2xz
11. (x + y - z)2 = x2 + y2 + z2 + 2xy - 2yz - 2xz
12. (x - y + z)2 = x2 + y2 + z2 - 2xy - 2yz + 2xz
13. (x - y - z)2 = x2 + y2 + z2 - 2xy + 2yz - 2xz
Temperature Conversions :
ºC = 5959 ( ºF - 32 ) ºF = 9595 ( ºC + 32 )
Simple Interest = PTR100PTR100
Pythagorean Theorem:
a2 + b2 = c2

Laws of Exponents
Product Law: am*an = am+n
Quotient Law: = aman=am−naman=am−n, if m>n
= 1an−m1an−m ,if n>m
Power law: (am)n = amn
HOPE IT LIKES U
PLZ MARK IT AS BRAINIEST ANSWER
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