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What are the x-intercepts of the graph of the equation y = x² + 4x - 5 ?

5 and 1
-5 and 1
-5 and 0
5 and -1

User Temi
by
7.4k points

1 Answer

4 votes

Answer:

The x-intercepts of the graph of the equation y = x² + 4x - 5 is -5 and 1

Explanation:

Given:

y = x² + 4x-5

To Find:

x-intercepts

Solution:

Finding the value of the x by using quadratic formula

x =
(-b \pm √(b^2 -4ac))/(2a)

On substituting the values ,

x =
(-4 \pm √((4)^2 -(4(1)(-5))))/(2(1))

x =
(-4 \pm √(16 -(-20)))/(2)

x =
(-4 \pm √(36))/(2)

x =
(-4 \pm6 )/(2)


x = (-4-6)/(2)
x = (-4+6)/(2)


x = (-10)/(2)
x = (2)/(2)

x = -5 x = 1

User Hwatkins
by
7.7k points

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