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3 years ago

5

In a two-digit number, tens digit is 5 more than the units digit. The number itself is 8 times the sum of it's digits. What is t

he number?

1 answer:

Radda [10]3 years ago

3 0

72

2+5=7

7+2=9×8=72

i just tried random numbers:

50, 61, 72, 83, 94 etc

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<img src="https://tex.z-dn.net/?f=2x%5E%7B2%7D%20-%2014x%20%2B%2024" id="TexFormula1" title="2x^{2} - 14x + 24" alt="2x^{2} - 14

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Answer:

Factorized

$=(2x-8)(x-3)$

Roots : 4 , 3

Step-by-step explanation:

If it is to factorize :

$2x^2 - 14x + 24 = 2x^2 -6x-8x +24$

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If it is to solve for x :

$2x^2 -1 4x + 24 = 0\\(2x-8)(x-3)=0\\2x - 8 = 0 \ , \ x - 3 = 0\\2x = 8 \ , \ x = 3\\x = 4 , 3$

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Answer:

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