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 \cdot (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

lo g_{19} (16)

2 a + 2 b

(32 x^{20} y^{- 10})^{- \frac{1}{5}}

6 x^{2} - 5 x - 4

\frac{9}{4} = \frac{7 x + 6}{2}

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