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HELP PLSSS ASAP!!!!!!

HELP PLSSS ASAP!!!!!!-example-1
User Rocco
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2 Answers

7 votes

Answer: p=5+3/2 or p=5-3/2

Explanation:

User Alaa Salah
by
8.3k points
6 votes


\qquad\qquad\huge\underline{{\sf Answer}}♨

Let's solve ~


\qquad \sf  \dashrightarrow \: {p}^(2) - 10p + 7 = 0

Now, let's use Quadratic formula :


\qquad \sf  \dashrightarrow \:x = \frac{ - b \pm \sqrt{ {b}^(2) - 4ac } }{2a}


\qquad \sf  \dashrightarrow \:x = \frac{ - ( - 10) \pm \sqrt{ {( - 10)}^(2) - 4(1 * 7) } }{2 * 1}


\qquad \sf  \dashrightarrow \:x = ( 10 \pm √( 100- 28 ) )/(2 )


\qquad \sf  \dashrightarrow \:x = ( 10 \pm √( 72 ) )/(2 )


\qquad \sf  \dashrightarrow \:x = ( 10 \pm6 √( 2 ) )/(2 )


\qquad \sf  \dashrightarrow \:x = ( 2(5 \pm3 √( 2 )) )/(2 )


\qquad \sf  \dashrightarrow \:x = (5 \pm3 √( 2 ))

So, the required roots are :


\qquad \sf  \dashrightarrow \:x = 5 + 3 √( 2 )

and


\qquad \sf  \dashrightarrow \:x = 5 - 3 √(2)

User Rodrigo Gama
by
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