+267 So I got these problems and we didn't go over this in class.
What value of x will give the minimum value for 9x^2 + 18x + 7?
Help please?
+9479 The x value that gives the minimum or maximum value for a quadratic function,
ax2 + bx + c , is - \(\frac{b}{2a}\) .
So for this one...
The x value that gives the minimum or maximum value for
9x2 + 18x + 7 is - \(\frac{18}{2(9)}\) = - 1 .
And in this case, 9 is positive, so the parabola opens upward, and we have a minimum.
+9479 The x value that gives the minimum or maximum value for a quadratic function,
ax2 + bx + c , is - \(\frac{b}{2a}\) .
So for this one...
The x value that gives the minimum or maximum value for
9x2 + 18x + 7 is - \(\frac{18}{2(9)}\) = - 1 .
And in this case, 9 is positive, so the parabola opens upward, and we have a minimum.
