Question

What are the solutions to the quadratic equation 4x2 + 28x = 0?

Answer 1

x is 0 or -7

Explanation:

`4x^(2) +28x=0\\4x(x} +7)=0\\4x=0 x=0\\x+7=0\\x=-7`

Answer 2

x = {-7, 0}

Explanation:

4x^2 + 28x = 0

Divide both sides by 4

x^2 + 7x = 0

Factor out x

x(x + 7) = 0

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From the zero product rule

x = 0

and

x + 7 = 0

subtract 7 from both sides

x = -7

x = {-7, 0}