Math, asked by dk906755pdkgfe, 1 year ago

:दो वास्तविक संख्याओं का अन्तर 7 है। यदि इनके वर्गो का अन्तर 210 है, तो उन दोनो वास्तविक  संख्याओं का योग है
a.30
b.40
c.50
d. n.o.t

Answers

Answered by aditya4783
1
x-y=7
x²-y²=210
x=7+y
[y+7]²+y²=210
y²+49+14y-y²=210
49+14y=210
14y=161
y=11.5
x=7+11.5=18.5
then x+y=18.5+11.5=30answea

dk906755pdkgfe: short trick h kya
Answered by shubhi9643
1

let the two nos be a and b( let a be greater)

given

a-b=7 ....eq(1)

a^2-b^2=210

(a-b)(a+b)=210

7(a+b)=210

a+b=30

this is the shortest method



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