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vladimir1956 [14]
3 years ago
14

X2+2x-15=0 factorising

Mathematics
2 answers:
sertanlavr [38]3 years ago
5 0

Answer:

    x²+2x-15  = (x-3)(x+5)

Step-by-step explanation:

hello :

x²+2x-15=0

(x²+2x+1)-1-15=0

(x+1)²-16=0

(x+1)²-4² = (x+1-4)(x+1+4)   use identity : a²-b² = (a-b)(a+b)

             x²+2x-15  = (x-3)(x+5)

MariettaO [177]3 years ago
3 0

Answer:

(x-3)(x+5)

Step-by-step explanation:

x²+2x-15 find two numbers that add to make +2 and make a product of -15

-3×5=-15

-3+5=2

(x-3)(x+5)

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Answer:

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Step-by-step explanation:

6 0
3 years ago
Given the exponential equation 4x = 64, what is the logarithmic form of the equation in base 10?
zysi [14]
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By taking <span>logarithmic of base 10

∴ </span><span>log 4^{x} = log 64

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∴ x =  \frac{log \ 64}{log \ 4}
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∴ The correct choice is
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Step-by-step explanation:

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1 Which type of data is best represented using a line plot?
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Step-by-step explanation:

#1) A line plot shows the frequencies of data.  It is displayed over a number line; this makes the best choice for the answer "frequency data that can be plotted on a number line."

#2) We can see that Sarah read 2 chapters on Wednesday and 1 chapter on Monday.  This is twice as many chapters.

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3 years ago
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