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Juli2301 [7.4K]
3 years ago
9

Solve for x:

} = 9" alt="(x - 5)^{2} = 9" align="absmiddle" class="latex-formula">
​
Mathematics
2 answers:
Valentin [98]3 years ago
5 0
X-5=3 as the square root of 9 is 3
X=8 plus 5
Hope this helps
Sedaia [141]3 years ago
3 0

Answer:

Step-by-step explanation:

(x-5)^2=9

(x-5)(x-5)=9

x^2-10x+25=9

x^2-10x+16=0

(x-8)(x-2)

x=8,2

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multiplicative inverse or reciprocal for a number x, denoted by 1/x or x−1, is a number which when multiplied by xyields the multiplicative identity, 1.

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In a class, 45 students are taking the SAT exam.The number of boys is 9 more than the number of girls.How many girls and boys ar
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The equation would be
g + (g + 9) = 45
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Step-by-step explanation:

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3 years ago
I AM IN DESPERATE NED OF QUICK HELP PLEASEEEEEEEEEEEEEEEEEEEEEE!!!!!!!!!!!!!!!!!!!!!!
rosijanka [135]

Answer:

16

Step-by-step explanation:

To solve this equation, we need the formula for perfect squares:

  • (a + b)^2 = a^2 + 2ab + b^2

or

  • (a - b)^2 = a^2 - 2ab + b^2 <em>this is the formula we will use because the signs match the one in the question</em>.

Knowing these, we can set up an equation that assumes that the answer we will end up with is a perfect square.

Work:

(v - x)^2 = v^2 -8v + x^2

  • this is the setup for being able to solve for the unknown x, now we need to solve for x.

(v - x)^2 = v^2 - 8v + x^2 (I replaced 2ab with 8v because I'm setting up this question to be a perfect square).

(v - x) (v - x) = v^2 - 8v + x^2

  • multiply the left side. Remember that your answer will not be v^2 + x^2, but v^2 - 2vx +x^2.

v^2 - 2vx + x^2 = v^2 + 8v + x^2

  • Divide like terms and isolate the variable. In this case, v^2 and x^2 are on both sides, so dive them and they will be canceled out.

2vx = 8v

  • divide by 2v and you will have your value for x.

x = 4

  • Now we plug x into our original equation equation for perfect squares.

(v - 4)^2 = v^2 - 8v + 16

Our final answer is 16.

5 0
4 years ago
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