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-BARSIC- [3]
4 years ago
12

Help quick !!!!!!!!!!!!!!

Mathematics
2 answers:
ser-zykov [4K]4 years ago
7 0

(7×5)+(7×9)

7×(5+9)=98

(7×5)+(7×9)=35+63=98

vfiekz [6]4 years ago
5 0

Answer: the correct answer is ( 7 * 5 ) + (7 * 9 )

Step-by-step explanation:

7 * ( 5+9) = (7 *  __) + ( 7 * __) = ( 7 * 5 ) + (7 * 9 )

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Find all complex solutions of 7x^2-7x+3=0
Sedaia [141]

Answer:

The complex solutions are

x =  (\frac{7-\sqrt{35}  i }{42} , ) x =  \frac{7 + \sqrt{35} i }{42})

Step-by-step explanation:

<u><em>Step(i):-</em></u>

Given equation  7 x² - 7 x +3=0

                     x =  (\frac{-b -\sqrt{b^{2}-4ac } }{2ac} ,  \frac{-b +\sqrt{b^{2}-4ac } }{2ac})

Given standard equation

                         a x² +b x +c =0

 a = 7 , b= -7 and c=3

<u><em>Step(ii):-</em></u>

<u><em></em></u>x =  (\frac{-(-7) -\sqrt{(-7)^{2}-4(7)(3) } }{2(7)(3)} ,  \frac{-(-7) +\sqrt{(-7)^{2}-4(7)(3) } }{2(7)(3)})<u><em></em></u>

<u><em></em></u>x =  (\frac{7-\sqrt{(49-84 } }{42} ,  \frac{7 +\sqrt{(49-84 } }{42})<u><em></em></u>

x =  (\frac{7-\sqrt{35i^{2} }  }{42} ,  \frac{7 + \sqrt{35i^{2} }  }{42})

x =  (\frac{7-\sqrt{35}  i }{42} ,  \frac{7 + \sqrt{35} i }{42})

<u><em></em></u>

8 0
3 years ago
98 POINTS! PLEASE ANSWER QUICKLY AND CORRECTLY. WILL MARK BRAINLIEST.
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8 0
4 years ago
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20 x 2 x 60 x 2 = 4800

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