10.Simplity by using identities.
(1) (55)2
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Step-by-step explanation:
(55)^2
= (50+5)^2 (a+b) ^2= a^2+2ab+b^2
= (50)^2+2(50)(5)+(5)^2
= 2500+500+25
= 3025
(55)^2= 3025
(15) ^3
= (10+5) ^3 (a-b) ^3= a^3+3a^2b+3ab^2+b^3
=( 10) ^3+ 3(10) ^2(5) +3(10) (5) ^2+5^3
= 1000+ 1500+750+125
= 3375
(15) ^3= 3375
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