Q. Solve the quadratic by factoring.4x2−13x+11=−5x+8Answer: x=
Move to Standard Form: Write the equation in standard form by moving all terms to one side of the equation.4x2−13x+11=−5x+8Add 5x to both sides and subtract 8 from both sides to get:4x2−13x+5x+11−8=0Combine like terms:4x2−8x+3=0
Identify Coefficients: Identify a, b, and c in the quadratic equationax2+bx+c=0.For the equation 4x2−8x+3=0:a=4b=−8c=3
Find Multiplying Numbers: Find two numbers that multiply to a∗c (4∗3=12) and add up to b (−8).The two numbers that fit this requirement are −6 and −2 because:−6∗−2=12−6+−2=−8
Split Middle Term: Rewrite the equation by splitting the middle term using the two numbers found in Step 3.4x2−6x−2x+3=0Group the terms:(4x2−6x)+(−2x+3)=0
Factor by Grouping: Factor by grouping.From the first group 4x2−6x, factor out the greatest common factor, which is 2x:2x(2x−3)From the second group −2x+3, factor out −1:−1(2x−3)Now we have:2x(2x−3)−1(2x−3)=0
Factor Common Binomial: Factor out the common binomial factor (2x−3).(2x−1)(2x−3)=0
Set Equal and Solve: Set each factor equal to zero and solve for x.2x−1=0 or 2x−3=0For 2x−1=0:2x=1x=21For 2x−3=0:2x=3x=23
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