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photoshop1234 [79]
3 years ago
15

3-X²=-7 How do I solve

Mathematics
1 answer:
irga5000 [103]3 years ago
8 0

Answer:

x = 3.162

Step-by-step explanation:

Your first step is to get x by itself by subtracting 3 from both sides.

3-x^{2} = -7

-x^{2} = -10

Now multiply by both sidex by -1 to make x positive.

x^{2} = 10

now take the square root of both sides.

\sqrt {x^{2} = \sqrt{10}

x = \sqrt{10}

x = 3.162

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Find the vertex of the graph of the function.
lapo4ka [179]

Answer: The correct options are  (1) (5,10), (2) (3,-3), (3) x = -1, (4) y=(x+2)^2+3, (5) 21s and (6) 0, -1, and 5.

Explanation:

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(1)

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f(x)=4x^2+8x+7

f(x)=4(x^2+2x)+7

To make perfect square add (\frac{b}{2a})^2, i.e., 1. Since there is factor 4 outside the parentheses, so subtract three times of 1.

f(x)=4(x^2+2x+1)+7-4

f(x)=4(x+1)^2+3

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h=-1 and k=3

The vertex of the equation is (-1,3) so the axis is x=-1 and the correct option is 2.

(4)

The given equation is,

y=x^2+4x+7

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