Use the quadratic formula to find the solutions.−b±√b2−4(ac)2a-b±b2-4(ac)2aSubstitute the values a=−1a=-1, b=0b=0, and c=40c=40 into the quadratic formula and solve for xx.0±√02−4⋅(−1⋅40)2⋅−10±02-4⋅(-1⋅40)2⋅-1Simplify.Tap for fewer steps...Simplify the numerator.Tap for more steps...x=0±4√102⋅−1x=0±4102⋅-1Simplify the denominator.Tap for more steps...x=0±4√10−2x=0±410-2Simplify 0±4√10−20±410-2.x=±2√10x=±210The result can be shown in both exact and approximate form.x=±2√10x=±210x≈6.324555,−6.324555
