the difference between squares of two number is 120 the square of smaller number is twice the greater number find the number
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Answered by
8
Let the greater no be x and smaller no be y
So A. To. Q
x²-y²=120--------------(1)
Also
y²=2x
Put y²=2x in eq (1)
x²-2x=120
2x²-2x-120=0
x²-12x+10x-120=0
x(x-12)+10(x-12)=0
(x-12)(x+10)=0
x=12 and x=-10
Buy second result is imagenary hence ans is 12 and 2root6
jhaharsh878:
much helpful for me
thanks
Answered by
3
shortly,x²-2x=120
x²-2x-120=0
x=12
so,the number is 12 ie...(12)²-2×12=120
Hope it helps!!!
x²-2x-120=0
x=12
so,the number is 12 ie...(12)²-2×12=120
Hope it helps!!!
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