Asked by logan

What are the solutions to the quadratic equation 3(x+5)(x−7)=0?


Answered by Leo Galleguillos
One way to solve is to expand the equation and then use the quadratic equation to solve for x.
Answered by Bosnian
Solving an equation whose product is zero is by setting each factor to zero.

3 ( x + 5 ) ( x − 7) = 0

Divide both sides by 3

( x + 5 ) ( x − 7) = 0

x + 5 = 0 ⇒ x = - 5

x - 7 = 0 ⇒ x = 7

The solutions are x = - 5 and x = 7

Answered by logan
So the answers 5?
Answered by Leo Galleguillos
Bosnian's approach is much better.
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