What are the solutions to the equation x^2+2x-20=9 ?

The solutions to the equation x^2+2x-20=9 are x=-1+sqrt(30),x=-1-sqrt(30)

Find the zeros of x^2+2x-20=9

The zeros of x^2+2x-20=9 are x=-1+sqrt(30),x=-1-sqrt(30)

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x^{2} + 2 x - 20 = 9

x = - 1 + 30, x = - 1 - 30

Decimal Notation

x = 4.47722 \dots, x = - 6.47722 \dots

Solution steps

x^{2} + 2 x - 20 = 9

Move

9

to the left side

x^{2} + 2 x - 29 = 0

Solve with the quadratic formula

x_{1, 2} = \frac{- 2 \pm 2 ^{2} - 4 \cdot 1 \cdot ( - 29 )}{2 \cdot 1}

2^{2} - 4 \cdot 1 \cdot (- 29) = 230

x_{1, 2} = \frac{- 2 \pm 2 30}{2 \cdot 1}

Separate the solutions

x_{1} = \frac{- 2 + 2 30}{2 \cdot 1}, x_{2} = \frac{- 2 - 2 30}{2 \cdot 1}

x = \frac{- 2 + 2 30}{2 \cdot 1} : - 1 + 30

x = \frac{- 2 - 2 30}{2 \cdot 1} : - 1 - 30

The solutions to the quadratic equation are:

x = - 1 + 30, x = - 1 - 30

2 x^{2} - 8 x = 24

4 x^{2} - 12 x

u^{2} - 8 = 7 u

4 x (1 - x) = x

x^{2} - 10 x - 20 = 0

What are the solutions to the equation x^2+2x-20=9 ?
The solutions to the equation x^2+2x-20=9 are x=-1+sqrt(30),x=-1-sqrt(30)
Find the zeros of x^2+2x-20=9
The zeros of x^2+2x-20=9 are x=-1+sqrt(30),x=-1-sqrt(30)