What are the solutions to the equation 7x^2=21x ?

The solutions to the equation 7x^2=21x are x=0,x=3

Find the zeros of 7x^2=21x

The zeros of 7x^2=21x are x=0,x=3

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7 x^{2} = 21 x

x = 0, x = 3

Solution steps

7 x^{2} = 21 x

Move

21 x

to the left side

7 x^{2} - 21 x = 0

Factor

7 x^{2} - 21 x : 7 x (x - 3)

7 x (x - 3) = 0

Using the Zero Factor Principle:

ab = 0

then

a = 0

b = 0

x = 0 or x - 3 = 0

Solve

x - 3 = 0 : x = 3

The solutions to the quadratic equation are:

x = 0, x = 3

\frac{- 6 + 3 x}{- 2} = - 4 - x

0 = x^{2} + 10 x + 25

\frac{( x ^{2} - 25 y ^{2} )}{( x ^{2} + 10 x y + 25 y ^{2} )}

lo g_{8} (\frac{1}{8})

2 a^{2} + 8 ab - 3 a - 12 b

What are the solutions to the equation 7x^2=21x ?
The solutions to the equation 7x^2=21x are x=0,x=3
Find the zeros of 7x^2=21x
The zeros of 7x^2=21x are x=0,x=3