Question

płêāžêëëëë.........................šôļvě âņýôņê..

î ņêèđ íť mó§ț​

Answer 1

Answer:

215² = x(x+1)100 + 5²

215²-5² = (x²+x)100

(215+5)(215-5) = (x²+x)100

462 = x²+x = 21²+21

x = 21

similarly,

405² = y(y+1)*100+5²

(405+5)(405-5) = y(y+1)*100

164000 = y(y+1)*100

1640 = y(y+1) = 40(40+1)

Y = 40

so,

x*y = 21*40 = 840 (Ans.)

[ mark as brainlist ]

Answer 2

Answer:

c is answer of this questions

plzzzzzzz make it a brainlist answer