Q. Solve the equation 4x2−10x+8=−x2+22 to the nearest tenth.Answer: x=
Combine like terms: Combine like terms by moving all terms to one side of the equation.We will add x2 to both sides and subtract 22 from both sides to get all terms on the left side.4x2−10x+8+x2−22=0This simplifies to:5x2−10x−14=0
Solve quadratic equation: Solve the quadratic equation.We can use the quadratic formula, x=2a−b±b2−4ac, where a=5, b=−10, and c=−14.First, calculate the discriminant (b2−4ac):Discriminant = (−10)2−4⋅5⋅(−14)Discriminant = 100+280Discriminant = 380
Calculate possible solutions: Calculate the two possible solutions for x using the quadratic formula.x=(2⋅5)−(−10)±380x=1010±380Since we need the answer to the nearest tenth, we will calculate the square root of 380 and then divide by 10.380≈19.5x≈10(10±19.5)
Find solutions: Find the two solutions for x.First solution:x≈(10+19.5)/10x≈29.5/10x≈2.95Second solution:x≈(10−19.5)/10x≈−9.5/10x≈−0.95
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