Mathematics: Solutions for 2x^2+18x=20, worth a ton, only 100% answers ! u !

Solutions for 2x^2+18x=20, worth a ton, only - id221820100174717, bbrid8590

anenee1

10.03.2022

The solution of the given quadratic equation is 1 and (-10).

Step-by-step explanation:

2x^2+18x=20

$x^2+9x=\frac{20}{2}$

x^2+9x-10=0

ax^2+bx+c=0

Solving equation by quadratic formula:

Here , a = 1,b = 9, c = (-10)

D=b^2-4ac=(9)^2-4(1)(-10)=121

$x=\frac{-b+{\sqrt{D}}}{2a}=\frac{(-9)+\sqrt{121}}{2(1)}=1$

$x=\frac{-b-{\sqrt{D}}}{2a}=\frac{(-9)-\sqrt{121}}{2(1)}=(-10)$

The solution of the given quadratic equation is 1 and (-10).

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