please answer this 9th and 10th question please and also explain it
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please answer this 9th and 10th question please and also explain it
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Answer:
sorry mate I am unable to solve it
Step-by-step explanation:
SEE CAREFULLY SOLUTION OF 9TH QUESTION
GIVEN IDENTITY= (A-B) SQ,= A SQ -2AB +B SQ
SO IN THIS CASE LETS TAKE
A=90
B=1 THEREFORE 90-1=89: WHOSE SQ WE HAVE TO FIND SO,
LETS PUT VALUES
(90-1) SQ= 90 SQ-2( 90×1)+ 1 SQ
SO , 90 SQ = 8100 -2(90)+ 1 SQ = 1
THEREFORE, 8100-180+1=7921
7921 IS THE SQ OF 89
VERIFICATION:
89×89=7921
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