1 April, 20:14
the line of symmetry of a parabola whose equation is y = ax ^ 2 - 4x + 3 is = -2 what is the value of "a"
1 April, 21:52
Y = ax² - 4x + 3
-b/2a is x - coordinate of the vertex,
line of symmetry x=-2, x=-2 is a coordinate of the vertex also, because the line symmetry has vertex.
x = - b/2a
x = - 2, b = - 4
-2 = - (-4) / 2a
a=2 / (-2) = -1
a = - 1
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» the line of symmetry of a parabola whose equation is y = ax ^ 2 - 4x + 3 is = -2 what is the value of "a"