Question

please answer this 9th and 10th question please and also explain it ​

Answer 1

Answer:

sorry mate I am unable to solve it

Answer 2

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

THANKS@REGARDS

THEVIBHANSHU