If (x^2 +15x + 50 = ax^2 + bx + c = 0). Which of the following statement is not true?
-
A.
x = -5 -
B.
x = 10 -
C.
x + 10 = 0 -
D.
bc = 750
Correct Answer: Option B
Explanation
(x^2 + 15x + 50 = 0)
(x^2 + 5x + 10x + 50 = 0)
(x(x + 5) + 10(x + 5) = 0)
((x + 5)(x + 10) = 0)
x + 5 = 0 or x + 10 = 0.
Comparing (x^2 + 15x + 50) with (ax^2 + bx + c), b = 15 and c = 50.
(therefore) bc = 750.