2006-10-11 16:06:16 · 3 answers · asked by KT V 2 in Science & Mathematics ➔ Mathematics
Hi Mr.Steve : This question is from this year's maths olympiad. Hence not likely to be wrong.
Hi Raja : It seems the equation B square = 4AC is for testing the expression A square X+ BX + C for perfect square.
2006-10-11 20:38:37 · update #1
Let the equation be " A square X + B X + C = 0
The equation given is not complete.
The square root is x = +/- Sq.Root of (B square - 4 AC)
= +/- sq.root of (19x19- 4x1x 92)
= +/- sq.root of (361- 368)
2006-10-11 19:09:44 · answer #1 · answered by SGraja 4 · 0⤊ 0⤋
the term "x^2 + 19x +92" will have a square root if the equation
x^2 + 19x +92=0 have two equal results.
now, the results of the given equation are
= {-19+â(361-368)}/2, {-19-â(361-368)}/2
= -9.5+(â7/2)i, -9.5-(â7/2)i
though complex the results are not the same, so this term cant have a square root
2006-10-12 12:02:04 · answer #2 · answered by avik r 2 · 0⤊ 0⤋
Since the expression is not a perfect square, you can't write a general expresion for its sq root. Youjust have to put in a value of X and take the root of the answer.
2006-10-11 23:14:21 · answer #3 · answered by Steve 7 · 0⤊ 0⤋