Math, asked by asiyaarif, 1 year ago

(69+21)(69+20) how to do this using identity?

Answers

Answered by renukasingh05011979
1
Answer:

By the identity:-

(x + a)(x + b)=x 2 + (a+b)x + ab

=69^2+(21+20)69 + 21*20

=4761+41*69+ 420

=4761+2829+420

=8010

I Hope It Will Help!
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Answered by Vanshitasingh
1

Answer:


Step-by-step explanation:

(69+21) (69+20)

:-(x+a) (x+a) x=69

=(x×x) +(a+b)x +ab a=21

=(69×69) +(21+20)69+(21)(20) b=20

=4761+2829+420

=8010


Vanshitasingh: Is it okkk
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