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3 years ago

Solve the system y=3x^2+3x-52x-y=3

Mathematics

2 answers:

Elenna [48]3 years ago

8 0

Y=3x^2+3x-5. and 2x-y=3
x=-.8 so y=4.6

olya-2409 [2.1K]3 years ago

6 0

1. You can’t solve that
2. solve for x:
2x=3+y
x=3+y/2

solve for y
-y=3-2x
y=-3+2x
y=2x-3

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3 years ago

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Answer:

Step-by-step explanation:

divide through by the coefficient of $x^{2}$

$\frac{5x^{2} }{5}$ + $\frac{16x}{5} + \frac{-40}{5} = \frac{8}{5}$

$x^{2} +\frac{16}{5}x -8 =\frac{8}{5}$

$x^{2} +\frac{16}{5} x = \frac{8}{5} +8$

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$x^{2} + \frac{16}{5}x + (\frac{1}{2} X \frac{16}{5} )^{2} =$ $\frac{48}{5} +(\frac{1}{2} X \frac{16}{5} )^{2}$

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$(x +\frac{16}{10})^{2} =\frac{304}{25}$

$x +\frac{16}{10} =$ ± $\sqrt{\frac{304}{25} }$

$x = -\frac{16}{10}$ ± $\sqrt{\frac{304}{25} }$

$x=-\frac{16}{10} + \sqrt{\frac{304}{25} }$ or $-\frac{16}{10} - \sqrt{\frac{304}{25} }$

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3 years ago

Solve the system y=3x^2+3x-52x-y=3​

Solve the system y=3x^2+3x-52x-y=3