Question Factor the expression 21(x4−24) Evaluate 21x4−12Solution 21(x4−24) Show Solution Find the roots x1=−424,x2=424Alternative Form x1≈−2.213364,x2≈2.213364 Evaluate 21x4−12To find the roots of the expression,set the expression equal to 0 21x4−12=0Move the constant to the right-hand side and change its sign 21x4=0+12Removing 0 doesn't change the value,so remove it from the expression 21x4=12Multiply by the reciprocal 21x4×2=12×2Multiply x4=12×2Multiply x4=24Take the root of both sides of the equation and remember to use both positive and negative roots x=±424Separate the equation into 2 possible cases x=424x=−424Solution x1=−424,x2=424Alternative Form x1≈−2.213364,x2≈2.213364 Show Solution
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