Q. Find one value of x that is a solution to the equation:(4x−1)2=20x−5x=
Expand squared term: Expand the squared term on the left side of the equation.(4x−1)2=(4x−1)(4x−1)=16x2−4x−4x+1Combine like terms.16x2−8x+1=20x−5
Combine like terms: Move all terms to one side to set the equation to zero.16x2−8x+1−20x+5=0Combine like terms.16x2−28x+6=0
Move terms to one side: Factor the quadratic equation, if possible.This step involves finding two numbers that multiply to 16×6=96 and add up to −28. However, since 96 is not easily factored into two numbers that add up to −28, we might need to use the quadratic formula to find the roots.
Factor quadratic equation: Use the quadratic formula to find the values of x. The quadratic formula is x=2a−b±b2−4ac, where a=16, b=−28, and c=6. Calculate the discriminant: b2−4ac=(−28)2−4(16)(6)=784−384=400
Use quadratic formula: Calculate the square root of the discriminant. 400=20
Calculate discriminant: Plug the values into the quadratic formula.x = 2⋅16−(−28)±20x = 3228±20
Calculate square root: Solve for the two possible values of x. x=3228+20 or x=3228−20 x=3248 or x=328 Simplify the fractions. x=23 or x=41
Plug values into formula: Choose one value of x as the solution.We can choose either x=23 or x=41 as the solution to the equation. Let's choose x=23 for this prompt.
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