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SVETLANKA909090 [29]
3 years ago
8

What equation results from completing the square and then factoring x^2+4x=7

Mathematics
1 answer:
Gekata [30.6K]3 years ago
8 0

Answer: x=−2+√11 or x=−2−√11

Step-by-step explanation:

x2+4x−7=7−7

x2+4x−7=0

For this equation: a=1, b=4, c=-7

1x2+4x+−7=0

Step 2: Use quadratic formula with a=1, b=4, c=-7.

x=

−b±√b2−4ac

2a

x=

−(4)±√(4)2−4(1)(−7)

2(1)

x=

−4±√44

2

x=−2+√11 or x=−2−√11

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Answer:

The correct option is:

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Step-by-step explanation:

We are given the coordinates of the point A,B and C of the triangle ΔABC as:

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Now it is given that there is dilation of this triangle about the origin with a scale factor of 4.

This means that the change in the coordinates after the transformation is given by the rule:

(x,y) → (4x,4y)

As A → A' , B → B' and C → C'

Hence the coordinates A',B' and C' are given by:

A' are (4×-1,4×3)=(-4,12)

B' are (4×2,4×1)=(8,4)

and C' are (4×-2,4×-1)=(-8,-4).

<em>Hence the coordinate point which is not a coordinate of dilation is:</em>

<em>begin ordered pair 4 comma 12 end ordered pair  i.e. (4,12)</em>

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3 years ago
What is the slope of the line through -5,7 and -5,-8
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Step-by-step explanation:

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Answer:

1. not a function

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Step-by-step explanation:

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