What are the solutions to the equation x(x+2)=15 ?

The solutions to the equation x(x+2)=15 are x=3,x=-5

Find the zeros of x(x+2)=15

The zeros of x(x+2)=15 are x=3,x=-5

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x (x + 2) = 15

x = 3, x = - 5

Solution steps

x (x + 2) = 15

Expand

x (x + 2) : x^{2} + 2 x

x^{2} + 2 x = 15

Move

15

to the left side

x^{2} + 2 x - 15 = 0

Solve with the quadratic formula

x_{1, 2} = \frac{- 2 \pm 2 ^{2} - 4 \cdot 1 \cdot ( - 15 )}{2 \cdot 1}

2^{2} - 4 \cdot 1 \cdot (- 15) = 8

x_{1, 2} = \frac{- 2 \pm 8}{2 \cdot 1}

Separate the solutions

x_{1} = \frac{- 2 + 8}{2 \cdot 1}, x_{2} = \frac{- 2 - 8}{2 \cdot 1}

x = \frac{- 2 + 8}{2 \cdot 1} : 3

x = \frac{- 2 - 8}{2 \cdot 1} : - 5

The solutions to the quadratic equation are:

x = 3, x = - 5

x^{16}

∣ x - 6 ∣ = 0.02

4^{\frac{- 1}{2}}

75 \cdot 4

35 - \frac{1}{5} 3 x + 1 = 5

What are the solutions to the equation x(x+2)=15 ?
The solutions to the equation x(x+2)=15 are x=3,x=-5
Find the zeros of x(x+2)=15
The zeros of x(x+2)=15 are x=3,x=-5