Question Simplify the expression 625x4−2000x3+2400x2−1280x+256 Evaluate (5x−4)4Solution 625x4−2000x3+2400x2−1280x+256 Show Solution Find the roots x=54Alternative Form x=0.8 Evaluate (5x−4)4To find the roots of the expression,set the expression equal to 0 (5x−4)4=0The only way a power can be 0 is when the base equals 0 5x−4=0Move the constant to the right-hand side and change its sign 5x=0+4Removing 0 doesn't change the value,so remove it from the expression 5x=4Divide both sides 55x=54Solution x=54Alternative Form x=0.8 Show Solution
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