Question

Four times of a positive whole number is 30 less than twice thecsquare of the number.The number is:

Answer 1

Answer:

120

Step-by-step explanation:

0x4=0

4x3=12

12x1=12

30x4=120

theres your answer BUddy!

Answer 2

$\huge\boxed{\texttt{\fcolorbox{Red}{aqua}{Hey Mate!!!!}}}$

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Here is your answer.
Let the number is x
ATQ
$4x = 2x {}^{2} - 30 \\ 2x {}^{2} - 4x - 30 = 0 \\ x {}^{2} - 2x - 15 = 0 \\ x {}^{2} - 5x + 3x - 15= 0 \\ x(x - 5) + 3(x - 5) = 0 \\ (x - 5)(x + 3) = 0 \\ x = - 3 \: and \: 5 \\ whole \: number \: is \: not \: negative \\ hence \: x = 5$
So The number is 5
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