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Artemon [7]
2 years ago
12

Which equations are true for x = –2 and x = 2? Select two options

Mathematics
1 answer:
brilliants [131]2 years ago
4 0

Answer:

x^2 – 4 = 0

Step-by-step explanation:

When x = - 2,

x^2 - 4 = 0

( - 2 )^2 - 4 = 0

4 - 4 = 0

When x = 2,

x^2 - 4 = 0

2^2 - 4 = 0

4 - 4 = 0

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1. The graph of quadratic function h is shown below. What are the zero(s) of h?
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1 year ago
Simplify the expression:<br> (1 2/7)(-4 1/5)
stealth61 [152]

Answer:

-27/5 or -5 2/5

Step-by-step explanation:

Simplify

1 2/7 to 9/7

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4 0
2 years ago
Given the equation 4x2 − 8x + 20 = 0, what are the values of h and k when the equation is written in vertex form a(x − h)2 + k =
GenaCL600 [577]

Answer:

The correct option is:

h = 1, k = 16

Step-by-step explanation:

y=4x^2-8x+20 =0

It is a quadratic formula in standard form:

ax^2+bx+c

where a = 4 , b = -8 and c=20

The vertex form is:

a(x − h)2 + k = 0

h is the axis of symmetry and (h,k) is the vertex.

Calculate h according to the following formula:

h = -b/2a

h= -(-8)/2(4)

h = 8/8

h = 1

Substitute k for y and insert the value of h for x in the standard form:

ax^2+bx+c

k = 4(1)^2+(-8)(1)+20

k = 4-8+20

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k = 16

Thus the correct option is h=1, k=16....

8 0
3 years ago
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