3 years ago

3/8r-1/4r+2s please i need help!!

Mathematics

2 answers:

12345 [234]3 years ago

7 0

3x(8r-1) x (4r+2s)

3x7r x (4r+2s)

21r x (4r+2s)

Vlad1618 [11]3 years ago

7 0

3r/8+-r/4+2s something

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Solve using Quadratic Formula <br>x^2 + 3x - 3 = 0

katrin [286]

Answer:

a= 1 , b= 3 , c= –3

$x = \frac{ - b \frac{ + }{} \sqrt{ {b}^{2} - 4ac} }{2a} \\ x = \frac{ - 3 \frac{ + }{} {} \sqrt{ {3}^{2} - 4(1)( - 3)} }{2(1)} \\ = \frac{ - 3 \frac{ + }{} \sqrt{9 + 12} }{2} = \frac{ - 3 \frac{ + }{} \sqrt{21} }{2} \\ \\ x = \frac{ - 3 \frac{ + }{} \sqrt{21} }{2} \\ \\ x = 0.79 \\ x = - 3.79$