Solve 0=20^2+2*(-9.8)*x

$$0= { 20 }^{ 2 } +2 \times (-9.8) \times x$$

Solve for x

$$x = \frac{1000}{49} = 20\frac{20}{49} \approx 20.408163265$$

Steps for Solving Linear Equation

Calculate 20 to the power of 2 and get 400.

$$0=400+2\left(-9.8\right)x$$

Multiply 2 and -9.8 to get -19.6.

$$0=400-19.6x$$

Swap sides so that all variable terms are on the left hand side.

$$400-19.6x=0$$

Subtract 400 from both sides. Anything subtracted from zero gives its negation.

$$-19.6x=-400$$

Divide both sides by -19.6.

$$x=\frac{-400}{-19.6}$$

Expand \frac{-400}{-19.6} by multiplying both numerator and the denominator by 10.

$$x=\frac{-4000}{-196}$$

Reduce the fraction \frac{-4000}{-196} to lowest terms by extracting and canceling out -4.

$$x=\frac{1000}{49}$$