Q. Solve the equation 5x2−18x+5=−6x to the nearest tenth.Answer: x=
Move terms to one side: First, we need to move all terms to one side of the equation to set the equation to zero. We do this by adding 6x to both sides of the equation.5x2−18x+5+6x=05x2−12x+5=0
Solve quadratic equation: Next, we need to solve the quadratic equation. We can either factor the quadratic, complete the square, or use the quadratic formula. The quadratic formula is x=2a−b±b2−4ac, where a, b, and c are the coefficients from the quadratic equation ax^2 + bx + c = 0. In our case, a = 5, b = −12, and c = 5.
Plug values into formula: Now we will plug the values of a, b, and c into the quadratic formula to find the values of x.x = 2(5)−(−12)±(−12)2−4(5)(5)x = 1012±144−100x = 1012±44
Simplify and divide: We simplify under the square root and then divide by 10.x = 1012±44x = 1012±211x = 56±11
Calculate decimal values: Now we calculate the approximate decimal values for the two solutions.x ≈ 56+11 and x ≈ 56−11x ≈ 56+3.317 and x ≈ 56−3.317x ≈ 59.317 and x ≈ 52.683x ≈ 1.8634 and x ≈ 0.5366
Round to nearest tenth: Finally, we round each solution to the nearest tenth. x≈1.9 and x≈0.5
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