Question

please anyone solve these questions please no 12 and 13​

Answer 1

Answer:

hello!

Step-by-step explanation:

(i) We can write (98)^2 as ( 100 - 2)^2

Therefore it is our (a-b) ^2 Identity!

So, (100-2)^2 = (100)^2 + (2)^2 - 2(100)(2)

= 10000 + 4 - 400

Which is equal to

=10004-400 = 9604

Therefore 98^2 = 9604.

2.Answer:

-3x² -x -16

Step-by-step explanation:

( x² -4x +7 ) + ( 2x² +5x -9 )  + y  = 0

(  3x² +x + 16 ) + y    = 0

                       y  =  -3x² -x  -16

∴  -3x² -x -16  is to be added to get  zero

hope it helps!!

Answer 2

Step-by-step explanation:

12 no. 98*98

12 no. 15*15*15*15*15*15 x 15*15*15*15*15*15*15*15

13 no. 3xsquare -4x +7 - (2xsquare +5x -9)

xsquare -4x + 7 -2xsquare -5x +9

3xsquare -9 + 16