Q. Solve the quadratic by factoring.3x2+9x−1=x+2Answer: x=
Move Terms to One Side: Move all terms to one side of the equation to set it equal to zero.Subtract x and 2 from both sides of the equation.3x2+9x−1−x−2=x+2−x−2This simplifies to:3x2+8x−3=0
Factor Quadratic Equation: Factor the quadratic equation3x2+8x−3. We need to find two numbers that multiply to 3×−3=−9 and add up to 8. The numbers that satisfy these conditions are 9 and −1. 9×−1=−99+(−1)=8
Rewrite Middle Term: Rewrite the middle term using the numbers found in Step 2.3x2+9x−x−3=0
Factor by Grouping: Factor by grouping.Group the first two terms and the last two terms.(3x2+9x)−(x+3)=0Factor out a common factor from each group.3x(x+3)−1(x+3)=0
Factor Common Binomial: Factor out the common binomial factor.(3x−1)(x+3)=0
Set Factors Equal: Set each factor equal to zero and solve for x.3x−1=0 or x+3=0For 3x−1=0:3x=1x=31For x+3=0:x=−3
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