2 years ago

In questions 6 – 9, state the solutions for the quadratic equation depicted in the graph.

Mathematics

1 answer:

Mariana [72]2 years ago

3 0

Step-by-step explanation:

It is just where it crosses the x axis

6) -3, -4

7) 1, -6

8) -5, -6

9) 3, -2.5

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Solve for x: (x+a)(x-b) = x^2 -1 How do I solve this ?

Sveta_85 [38]

You must factor.

$x^2-1=(x+1)(x-1)$

The factored form is equal to the assigned form.

$(x+1)(x-1)=(x+a)(x-b)$

Values a, b correspond to the factored 1, -1.

Value of x however remains unknown. But we can change that.

Given factored result,

$(x+1)(x-1)$

We can set expression equal to 0 then find such x that when added with number a or b results with 0.

$(x+1)(x-1)=0$

Hence x has 2 solutions.

$x+1=0\Rightarrow\boxed{x_1=-1} \\x-1=0\Rightarrow\boxed{x_2=1}$

Hope this helps.

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3 years ago

Read 2 more answers

11.3x + 7.2 = 86.3 A) 0.7 B) 7 C) 8 D 8.3

Gnom [1K]

11.3x + 7.2 = 86.3

11.3x + 7.2 (-7.2) = 86.3 (-7.2)

11.3x = 79.1

11.3x/11.3 = 79.1/11.3

x = 7

7 is your answer

hope this helps

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4 years ago

Find the domain and range y= 3x - 3

elena-14-01-66 [18.8K]

Domain: (-infinity, infinity)
Range: (-infinity, infinity)

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3 years ago

What are the answers to the last 3 problems

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16. 10
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Good luck!
There are more than one answers.

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3 years ago

Factor z^2 – 3z – 18. A. (z + 3)(z – 6) B. (z – 3)(z – 6) C. (z + 8)(z – 10) D. (z + 2)(z – 9)

ozzi

Work shown above! Answer would be A!

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