Question Simplify the expression x7−21x6+189x5−945x4+2835x3−5103x2+5103x−2187 Evaluate (x−3)7Solution x7−21x6+189x5−945x4+2835x3−5103x2+5103x−2187 Show Solution Find the roots x=3 Evaluate (x−3)7To find the roots of the expression,set the expression equal to 0 (x−3)7=0The only way a power can be 0 is when the base equals 0 x−3=0Move the constant to the right-hand side and change its sign x=0+3Solution x=3 Show Solution
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