Q. Solve the quadratic by factoring.4x2−9x+1=−4xAnswer: x=
Move Terms to One Side: Move all terms to one side of the equation to set it equal to zero.4x2−9x+1=−4x becomes 4x2−9x+4x+1=0 after adding 4x to both sides.Simplify the equation: 4x2−5x+1=0.
Identify a, b, c: Identify a, b, and c in the quadratic equationax2+bx+c=0. For the equation 4x2−5x+1=0, a=4, b=−5, and b0.
Find Multiplying Numbers: Find two numbers that multiply to a∗c (4∗1=4) and add up to b (−5).The numbers that satisfy these conditions are −4 and −1 because −4∗−1=4 and −4+−1=−5.
Rewrite Equation with Numbers: Rewrite the equation by splitting the middle term using the two numbers found in Step 3.4x2−4x−x+1=0.
Factor by Grouping: Factor by grouping.Group the first two terms and the last two terms: (4x2−4x)+(−x+1)=0.Factor out the common factors in each group: 4x(x−1)−1(x−1)=0.
Factor out Common Factor: Factor out the common binomial factor.(4x−1)(x−1)=0.
Set Factors Equal and Solve: Set each factor equal to zero and solve for x.4x−1=0 or x−1=0.For 4x−1=0, add 1 to both sides: 4x=1, then divide by 4: x=41.For x−1=0, add 1 to both sides: 4x−1=00.
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