(69+21)(69+20) how to do this using identity?
Answers
Answered by
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!
^_^
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
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
Is it okkk
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