find 2 consecutive positive odd numbers the sum of whose square is 74
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Answered by
1
Answer:
THE WAY OF EASIET METHOD YOUR ANSWER IS HERE MATE
let no. be x & x+2.
then, x^2 + (x+2)^2 =74
x^2 +x^2+4+2x=74
then,
2x^2 +2x+4-74=0
x^2+ 2x+2-37=0
x^2+2x-35=0
x^2+7x-5x-35=0
x(x+7)-5(x+7)=0
(x-5)(x+7)=0
x=5 & x=-7
Step-by-step explanation:
HOPE IT HELP U.
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Answered by
1
Answer:
Step-by-step explanation:
So let the 1st odd number be x, so the 2nd odd number will be x + 2.
Why x + 2? because if the odd number is 5 so the next odd number will be 7 or 5 + 2.
So putting the variables into equation...
By factorisation
x² + (x + 2)² = 74
x² + x² + 4x + 4 = 74
2x² + 4x + 4 = 74
2x² + 4x = 70
2x² + 4x -70 = 0
x² + 2x - 35 = 0
x² +7x -5x -35 = 0
x(x + 7) -5(x + 7) = 0
(x - 5) (x + 7) = 0
x = 5 and 7
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