What are the solutions to the equation 7x^2-x-66=0 ?

The solutions to the equation 7x^2-x-66=0 are x= 22/7 ,x=-3

Find the zeros of 7x^2-x-66=0

The zeros of 7x^2-x-66=0 are x= 22/7 ,x=-3

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7 x^{2} - x - 66 = 0

x = \frac{22}{7}, x = - 3

Decimal Notation

x = 3.14285 \dots, x = - 3

Solution steps

7 x^{2} - x - 66 = 0

Solve with the quadratic formula

x_{1, 2} = \frac{- ( - 1 ) \pm ( - 1 ) ^{2} - 4 \cdot 7 ( - 66 )}{2 \cdot 7}

(- 1)^{2} - 4 \cdot 7 (- 66) = 43

x_{1, 2} = \frac{- ( - 1 ) \pm 43}{2 \cdot 7}

Separate the solutions

x_{1} = \frac{- ( - 1 ) + 43}{2 \cdot 7}, x_{2} = \frac{- ( - 1 ) - 43}{2 \cdot 7}

x = \frac{- ( - 1 ) + 43}{2 \cdot 7} : \frac{22}{7}

x = \frac{- ( - 1 ) - 43}{2 \cdot 7} : - 3

The solutions to the quadratic equation are:

x = \frac{22}{7}, x = - 3

400 - x^{2} = \frac{x}{60} + 5

s^{2} + 2 s + 6 = 0

x^{2} + 8 x - 1 = 0

6 x^{2} = - 7 x + 20

1640.8 = 0.68 \cdot 2.14 \cdot 100 \cdot x \cdot (9.5 - 0.4 \cdot x)

What are the solutions to the equation 7x^2-x-66=0 ?
The solutions to the equation 7x^2-x-66=0 are x= 22/7 ,x=-3
Find the zeros of 7x^2-x-66=0
The zeros of 7x^2-x-66=0 are x= 22/7 ,x=-3