sommets y=5x^2-2x

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vertices y=5x²−2x

Solution

Minimum (15 , −15 )

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Find vertex using polynomial form

Find vertex using parabola form

Find vertex using vertex form

Find vertex using averaging the zeros

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y=5x²−2x

Parabola equation in polynomial form

The vertex of an up-down facing parabola of the form y=ax²+bx+c is x_v=−b2a

The parabola parameters are:

a=5, b=−2, c=0

x_v=−b2a

x_v=−(−2)2· 5

Simplify −−22· 5 : 15

x_v=15

Plug in x_v=15 to find the y_v value

y_v=−15

Therefore the parabola vertex is

(15 , −15 )

If a<0, then the vertex is a maximum value
If a>0, then the vertex is a minimum value
a=5

Minimum (15 , −15 )

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−▭▭	<	7	8	9	÷	`AC`
+▭▭	>	4	5	6	×	☐☐☐
×▭▭	(	1	2	3	−	`x`
▭ \|▭	)	.	0	=	+	`y`

sommets y=5x^2-2x

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