y= x² -3 x -4=
full cara
full cara
[tex]y=x ^ { 2 } -3x-4 \\ x^{2}-3x-4=y \\x^{2}-3x-4-y=0 \\ x^{2}-3x-y-4=0 \\x=\frac{-\left(-3\right)±\sqrt{\left(-3\right)^{2}-4\left(-y-4\right)}}{2} \\ = x=\frac{-\left(-3\right)±\sqrt{9-4\left(-y-4\right)}}{2} \\ = x=\frac{-\left(-3\right)±\sqrt{4y+25}}{2} \\ = x=\frac{-\left(-3\right)±\sqrt{4y+25}}{2} \\ = x=\frac{\sqrt{4y+25}+3}{2} \\ = x=\frac{-\sqrt{4y+25}+3}{2} [/tex]
[tex]x=\frac{\sqrt{4y+25}+3}{2} , x=\frac{-\sqrt{4y+25}+3}{2} [/tex]
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