Q. Solve the equation by factoring:168x+3x2−3x3=0Answer: x=
Factor GCF: Factor out the greatest common factor (GCF)Identify the GCF of the terms in the equation.The GCF of 168x, 3x2, and −3x3 is 3x.Factor out 3x from each term.3x(56+x−x2)=0
Rewrite Quadratic: Rewrite the quadratic in standard formThe quadratic part of the factored expression is currently in the form −x2+x+56. We need to rewrite it in standard form, which is ax2+bx+c.So, we have 3x(−x2+x+56)=0.Rewrite it as 3x(−(x2−x−56))=0.
Factor Expression: Factor the quadratic expressionNow we need to factor the quadratic expression -x^2 + x + 56").\(\newlineWe are looking for two numbers that multiply to \$-56\) and add up to \(1\).\(\newline\)The numbers are \(8\) and \(-7\).\(\newline\)So, the factored form is \(3x(-(x - 8)(x + 7)) = 0\).
Set Equal: Set each factor equal to zero\(\newline\)Now we have the factored form of the equation: \(3x(x - 8)(x + 7) = 0\).\(\newline\)Set each factor equal to zero to find the solutions for \(x\).\(\newline\)\(3x = 0\), \(x - 8 = 0\), and \(x + 7 = 0\).
Solve for x: Solve for x\(\newline\)Solve each equation for x.\(\newline\)For \(3x = 0\), \(x = 0\).\(\newline\)For \(x - 8 = 0\), \(x = 8\).\(\newline\)For \(x + 7 = 0\), \(x = -7\).
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