find the sum of zero of quadratic polynomial 3x 2 + 15 x +7
Answers
Answered by
2
Answer:
Answer is -5
Step-by-step explanation:
Given 3x²+15x+7 zeros (roots) of this Quadratic Expression
=3x²+15x+7
=roots of 3x²+15x+7 can be solved the formula
= -b+(b²-4ac)½ / 2a
= -15+(15²-4(3)(7))½ / 2(3)
= -15+(225-84)½ / 6
= -15+(141)½/6 and other root is -15-(141)½/6
= Sum of the zeroes is
=(-15+(141)½/6)+(-15-(141)½/6)
= -15+(141)½/6-15-(141)½/6
= -30/6
= -5
Answered by
2
Answer:
sum of zero = -b/a OR -coefficient of x/coefficient of x2
-b/a = -15/3
= -5
I hope your doubt had clear
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