Q. Solve the equation by factoring:2x3+14x2−36x=0Answer: x=
Factor GCF: First, we need to factor out the greatest common factor (GCF) from the given cubic equation.The equation is 2x3+14x2−36x=0.The GCF of the terms 2x3, 14x2, and −36x is 2x.So we factor out 2x from each term.2x(x2+7x−18)=0
Factor Quadratic: Now we need to factor the quadratic equationx2+7x−18. We are looking for two numbers that multiply to −18 and add up to 7. The numbers that satisfy these conditions are 9 and −2. So we can write the quadratic as (x+9)(x−2).
Find Roots: Now we have the factored form of the original equation:2x(x+9)(x−2)=0To find the roots, we set each factor equal to zero and solve for x.First, set 2x=0, which gives us x=0.
Set 1st Factor: Next, set the factor x+9 equal to zero:x+9=0Subtract 9 from both sides to solve for x:x=−9
Set 2nd Factor: Finally, set the factor x−2 equal to zero:x−2=0Add 2 to both sides to solve for x:x=2
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