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Simplifying -0.01x2 + 0.7x + 6.2 = 0 Reorder the terms: 6.2 + 0.7x + -0.01x2 = 0 Solving 6.2 + 0.7x + -0.01x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by -0.01 the coefficient of the squared term: Divide each side by '-0.01'. -620 + -70x + x2 = 0 Move the constant term to the right: Add '620' to each side of the equation. -620 + -70x + 620 + x2 = 0 + 620 Reorder the terms: -620 + 620 + -70x + x2 = 0 + 620 Combine like terms: -620 + 620 = 0 0 + -70x + x2 = 0 + 620 -70x + x2 = 0 + 620 Combine like terms: 0 + 620 = 620 -70x + x2 = 620 The x term is -70x. Take half its coefficient (-35). Square it (1225) and add it to both sides. Add '1225' to each side of the equation. -70x + 1225 + x2 = 620 + 1225 Reorder the terms: 1225 + -70x + x2 = 620 + 1225 Combine like terms: 620 + 1225 = 1845 1225 + -70x + x2 = 1845 Factor a perfect square on the left side: (x + -35)(x + -35) = 1845 Calculate the square root of the right side: 42.95346319 Break this problem into two subproblems by setting (x + -35) equal to 42.95346319 and -42.95346319.Subproblem 1
x + -35 = 42.95346319 Simplifying x + -35 = 42.95346319 Reorder the terms: -35 + x = 42.95346319 Solving -35 + x = 42.95346319 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '35' to each side of the equation. -35 + 35 + x = 42.95346319 + 35 Combine like terms: -35 + 35 = 0 0 + x = 42.95346319 + 35 x = 42.95346319 + 35 Combine like terms: 42.95346319 + 35 = 77.95346319 x = 77.95346319 Simplifying x = 77.95346319Subproblem 2
x + -35 = -42.95346319 Simplifying x + -35 = -42.95346319 Reorder the terms: -35 + x = -42.95346319 Solving -35 + x = -42.95346319 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '35' to each side of the equation. -35 + 35 + x = -42.95346319 + 35 Combine like terms: -35 + 35 = 0 0 + x = -42.95346319 + 35 x = -42.95346319 + 35 Combine like terms: -42.95346319 + 35 = -7.95346319 x = -7.95346319 Simplifying x = -7.95346319Solution
The solution to the problem is based on the solutions from the subproblems. x = {77.95346319, -7.95346319}
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