Question Simplify the expression x4−21 Evaluate (5×5x4)−21Solution More Steps Multiply the terms 5×5x4Cancel out the common factor 5 1×x4Multiply the terms x4 x4−21 Show Solution Find the roots x1=−421,x2=421Alternative Form x1≈−2.140695,x2≈2.140695 Evaluate (5×5x4)−21To find the roots of the expression,set the expression equal to 0 (5×5x4)−21=0Multiply the terms More Steps Multiply the terms 5×5x4Cancel out the common factor 5 1×x4Multiply the terms x4 x4−21=0Move the constant to the right-hand side and change its sign x4=0+21Removing 0 doesn't change the value,so remove it from the expression x4=21Take the root of both sides of the equation and remember to use both positive and negative roots x=±421Separate the equation into 2 possible cases x=421x=−421Solution x1=−421,x2=421Alternative Form x1≈−2.140695,x2≈2.140695 Show Solution
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