What are the solutions to the equation x(x-7)=18 ?

The solutions to the equation x(x-7)=18 are x=9,x=-2

Find the zeros of x(x-7)=18

The zeros of x(x-7)=18 are x=9,x=-2

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x (x - 7) = 18

x = 9, x = - 2

Solution steps

x (x - 7) = 18

Expand

x (x - 7) : x^{2} - 7 x

x^{2} - 7 x = 18

Move

18

to the left side

x^{2} - 7 x - 18 = 0

Solve with the quadratic formula

x_{1, 2} = \frac{- ( - 7 ) \pm ( - 7 ) ^{2} - 4 \cdot 1 \cdot ( - 18 )}{2 \cdot 1}

(- 7)^{2} - 4 \cdot 1 \cdot (- 18) = 11

x_{1, 2} = \frac{- ( - 7 ) \pm 11}{2 \cdot 1}

Separate the solutions

x_{1} = \frac{- ( - 7 ) + 11}{2 \cdot 1}, x_{2} = \frac{- ( - 7 ) - 11}{2 \cdot 1}

x = \frac{- ( - 7 ) + 11}{2 \cdot 1} : 9

x = \frac{- ( - 7 ) - 11}{2 \cdot 1} : - 2

The solutions to the quadratic equation are:

x = 9, x = - 2

x^{2} = 9

\frac{5 π}{6} + π

5 x - 4 \geq 5

x - 1 = x + 1

\frac{5}{8} \cdot 24

What are the solutions to the equation x(x-7)=18 ?
The solutions to the equation x(x-7)=18 are x=9,x=-2
Find the zeros of x(x-7)=18
The zeros of x(x-7)=18 are x=9,x=-2