Q. Solve the equation x2−4x+38=8x+4 to the nearest tenth.Answer: x=
Set Equation Equal to Zero: Bring all terms to one side of the equation to set it equal to zero.x2−4x+38=8x+4x2−4x−8x+38−4=0x2−12x+34=0
Use Quadratic Formula: Use the quadratic formula to solve for x. The quadratic formula is x=2a−b±b2−4ac, where a=1, b=−12, and c=34.
Calculate Discriminant: Calculate the discriminant b2−4ac to determine the nature of the roots.(\newline\)Discriminant = (−12)2−4(1)(34)(\newline\)Discriminant = 144−136(\newline\)Discriminant = $8(\newline\)Since the discriminant is positive, there are two real solutions.
Calculate Solutions: Calculate the two solutions using the quadratic formula.x=2⋅1−(−12)±8x=212±8
Simplify Square Root: Simplify the square root of the discriminant to the nearest tenth. 8≈2.8 (to the nearest tenth)
Finalize Solutions: Calculate the two values of x using the simplified square root.x=212+2.8 and x=212−2.8x≈214.8 and x≈29.2x≈7.4 and x≈4.6
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