Question Simplify the expression −x2−7 Evaluate −x×x−7Solution −x2−7 Show Solution Find the roots x1=−7×i,x2=7×iAlternative Form x1≈−2.645751i,x2≈2.645751i Evaluate −x×x−7To find the roots of the expression,set the expression equal to 0 −x×x−7=0Multiply the terms −x2−7=0Move the constant to the right-hand side and change its sign −x2=0+7Removing 0 doesn't change the value,so remove it from the expression −x2=7Change the signs on both sides of the equation x2=−7Take the root of both sides of the equation and remember to use both positive and negative roots x=±−7Simplify the expression More Steps Evaluate −7Evaluate the power 7×−1Evaluate the power 7×i x=±(7×i)Separate the equation into 2 possible cases x=7×ix=−7×iSolution x1=−7×i,x2=7×iAlternative Form x1≈−2.645751i,x2≈2.645751i Show Solution
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