What are the solutions to the equation x^2-7x=9 ?

The solutions to the equation x^2-7x=9 are x=(7+sqrt(85))/2 ,x=(7-sqrt(85))/2

Find the zeros of x^2-7x=9

The zeros of x^2-7x=9 are x=(7+sqrt(85))/2 ,x=(7-sqrt(85))/2

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x^{2} - 7 x = 9

x = \frac{7 + 85}{2}, x = \frac{7 - 85}{2}

Decimal Notation

x = 8.10977 \dots, x = - 1.10977 \dots

Solution steps

x^{2} - 7 x = 9

Move

9

to the left side

x^{2} - 7 x - 9 = 0

Solve with the quadratic formula

x_{1, 2} = \frac{- ( - 7 ) \pm ( - 7 ) ^{2} - 4 \cdot 1 \cdot ( - 9 )}{2 \cdot 1}

(- 7)^{2} - 4 \cdot 1 \cdot (- 9) = 85

x_{1, 2} = \frac{- ( - 7 ) \pm 85}{2 \cdot 1}

Separate the solutions

x_{1} = \frac{- ( - 7 ) + 85}{2 \cdot 1}, x_{2} = \frac{- ( - 7 ) - 85}{2 \cdot 1}

x = \frac{- ( - 7 ) + 85}{2 \cdot 1} : \frac{7 + 85}{2}

x = \frac{- ( - 7 ) - 85}{2 \cdot 1} : \frac{7 - 85}{2}

The solutions to the quadratic equation are:

x = \frac{7 + 85}{2}, x = \frac{7 - 85}{2}

4 x^{2} = - 24 x

(3 x - 2)^{3} = (3 x)^{3} - (2)^{3}

4 x^{2} - 28 x + 49 = 64

x^{2} + 6 x + 15

x^{2} + 6 x + 17

What are the solutions to the equation x^2-7x=9 ?
The solutions to the equation x^2-7x=9 are x=(7+sqrt(85))/2 ,x=(7-sqrt(85))/2
Find the zeros of x^2-7x=9
The zeros of x^2-7x=9 are x=(7+sqrt(85))/2 ,x=(7-sqrt(85))/2