Find the turning point of y = x^2+ 4x – 3 by completing the square.
Answers
Answered by
4
It is a quadratic function.
It has one turning point. Your graph must include that.
x
2
has a positive sign. The curve is concave upwards. It has a minimum.
x =
−
b
2
a
=
−
4
2
×
1
= -2
At x = -2 the curve turns. Take a few points on either side of '-2'.
-5, -4, -3, -2, -1, 0, 1 - This is the range of values.
Find the corresponding y co-ordinates.
Plot the points and connect the points with a smooth line.
It has one turning point. Your graph must include that.
x
2
has a positive sign. The curve is concave upwards. It has a minimum.
x =
−
b
2
a
=
−
4
2
×
1
= -2
At x = -2 the curve turns. Take a few points on either side of '-2'.
-5, -4, -3, -2, -1, 0, 1 - This is the range of values.
Find the corresponding y co-ordinates.
Plot the points and connect the points with a smooth line.
Similar questions