Q. Solve the equation by factoring:51x2−210x−3x3=0Answer: x=
Rearrange Equation: First, we need to rearrange the terms of the equation in descending order of the powers of x. Rearrange the equation: −3x3+51x2−210x=0
Factor Common Factor: Next, we factor out the greatest common factor, which is x in this case.Factor out x: x(−3x2+51x−210)=0
Factor Quadratic Expression: Now, we need to factor the quadratic expression inside the parentheses.We look for two numbers that multiply to −3×−210 (which is 630) and add up to 51.The numbers that satisfy these conditions are 63 and −10.Factor the quadratic: x(−3x2+63x−10x−210)=0
Group Terms for Factoring: We can now group the terms to factor by grouping.Group the terms: x((−3x2+63x)−(10x+210))=0
Factor Common Factors: Factor out the common factors from each group.Factor the first group by 3x and the second by 10: x(3x(−x+21)−10(−x+21))=0
Factor Out Common Factor: We notice that −x+21 is a common factor, so we factor it out.Factor out −x+21: x(−x+21)(3x−10)=0
Set Factors Equal to Zero: Now we have the equation in factored form, we can find the solutions by setting each factor equal to zero.Set each factor equal to zero: x=0, −x+21=0, 3x−10=0
Solve for x: Solve each equation for x.For x=0, we already have the solution: x=0.For −x+21=0, add x to both sides and subtract 21: x=21.For 3x−10=0, add 10 to both sides and divide by 3: x=310.
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