29-06-2016
Mathematics

Answered

In the equation y=3x2+bx-10 what is the value of b if the x-coordinate of the vertex is -5?

Verified Answer :

29-06-2016

Hello,

Here is a rapid method.

y=3x²+bx-10
y'=6x+b=0 with x=-5==>-30+b=0==>b=30

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