What is the vertex of the graph of y = x2 + 4x-1

vertex = (- 2, - 5 )

Step-by-step explanation:

Given a quadratic in standard form , y = ax² + bx + c : a ≠ 0

Then the x- coordinate of the vertex is

= -

y = x² + 4x - 1 ← is in standard form

with a = 1 and b = 4, thus

= - = - 2

Substitute x = - 2 into y for corresponding value

y = (- 2)² + 4(- 2) - 1 = 4 - 8 - 1 = - 5

vertex = (- 2, - 5 )

use substitution to solve each system of equations. y = x + 5 3x + y = 25 62/87,21 y = x + 5 3x + y = 25 substitute x + 5 for y in the second equation. substitute the solution for x into either equation to find y. the solution is (5, 10)

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step-by-step explanation: