What are the solutions to the equation x^2-0.8x-0.09=0 ?

The solutions to the equation x^2-0.8x-0.09=0 are x= 9/10 ,x=-1/10

Find the zeros of x^2-0.8x-0.09=0

The zeros of x^2-0.8x-0.09=0 are x= 9/10 ,x=-1/10

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x^{2} - 0.8 x - 0.09 = 0

x = \frac{9}{10}, x = - \frac{1}{10}

Decimal Notation

x = 0.9, x = - 0.1

Solution steps

x^{2} - 0.8 x - 0.09 = 0

Multiply both sides by

100

100 x^{2} - 80 x - 9 = 0

Solve with the quadratic formula

x_{1, 2} = \frac{- ( - 80 ) \pm ( - 80 ) ^{2} - 4 \cdot 100 ( - 9 )}{2 \cdot 100}

(- 80)^{2} - 4 \cdot 100 (- 9) = 100

x_{1, 2} = \frac{- ( - 80 ) \pm 100}{2 \cdot 100}

Separate the solutions

x_{1} = \frac{- ( - 80 ) + 100}{2 \cdot 100}, x_{2} = \frac{- ( - 80 ) - 100}{2 \cdot 100}

x = \frac{- ( - 80 ) + 100}{2 \cdot 100} : \frac{9}{10}

x = \frac{- ( - 80 ) - 100}{2 \cdot 100} : - \frac{1}{10}

The solutions to the quadratic equation are:

x = \frac{9}{10}, x = - \frac{1}{10}

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n^{2} + 15 n = - 43

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

3 x^{2} + 2 x - 5 = 2 x^{2} - 2

(2 x - 3) (x + c) = a x^{2} + b x - 12

What are the solutions to the equation x^2-0.8x-0.09=0 ?
The solutions to the equation x^2-0.8x-0.09=0 are x= 9/10 ,x=-1/10
Find the zeros of x^2-0.8x-0.09=0
The zeros of x^2-0.8x-0.09=0 are x= 9/10 ,x=-1/10